Answer:
The correct answer is option- b. homeostatic negative feedback mechanism, keeping a system near a set point.
Explanation:
Homeostasis is a resistance system of the body that balances the body according to the change to maintain equilibrium in the system or body. It can take place with negative or positive feedback.
The negative feedback mechanism is the action that opposes to cue or stimulus presented by the system. For example, GIP is the hormones that help in the increase in insulin release and suppress the release of glucagon. It also prevents the blood sugar hike by slow emptying of gastric.
Thus, the correct answer is - B. homeostatic negative feedback mechanism, keeping a system near a set point.
As Rick was filling out the loan application, he couldn't remember his previous address even though he had lived there for five years. Rick's memory of his current address was interfering with his memory of his old address, which is an example of:
Answer:
Retro Active Interference
Explanation:
This confusion of Rick's memory for his address for the previous one is attributed to Retro active interference.
The phenomena where recently learned memory of a person meddles with and blocks the review of previously learned data or memory is referred to as Retro active Interference.
This happens when the underlying demonstration of reviewing explicit data meddles with the recovery of the first data.
Investigators wish to purify an enzyme—a serine protease—using affinity chromatography. They attach to the matrix of an affinity column an antibody molecule that binds specifically to a short sequence of amino acids located in the enzyme’s active site. When they apply a mixture of proteins to the column, the protease adheres to the column and the other proteins pass through. To extract their purified enzyme from the column, the investigators add a large excess of the peptide that the antibody recognizes. What should they expect to occur after this treatment?
After adding an excess of the specific peptide to the column, investigators should expect the serine protease to be displaced from the antibody due to competitive binding, allowing them to collect the purified enzyme.
Explanation:Purification of Serine Protease Using Affinity Chromatography
When using affinity chromatography to purify an enzyme such as a serine protease, investigators can attach an antibody that specifically binds to a sequence of amino acids in the enzyme's active site to the column's matrix.
During the purification process, the enzyme adheres to the column while other proteins do not.
To elute the bound serine protease, investigators can add an excess of the specific peptide recognized by the antibody.
This competitive process should result in the displacement of the serine protease from the column, allowing its collection in a now purified form.
The logic behind this method is based on the principle of competitive binding, where the free peptide competes with the bound enzyme for the antibody attached to the column.
Because a large excess of the peptide is added, it outcompetes the enzyme's binding to the antibody, thus releasing the enzyme into the solution where it can be collected.
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The picture is a major macromolecule.
What best describes the function of this macromolecule?
A
It is broken down to provide usable chemical energy.
B
It stores and transmits genetic information.
C
It transports oxygen in the blood.
D
It helps plants retain water.
Answer:
B
Explanation:
This macromolecule is DNA. Its stored genetic information in form of genes that translate to functional or structural proteins that make up an organism. The DNA double helix is unzipped by helicases enzymes into single strands. RNA polymerase transcribes the single strands into mRNA. The mRNA is then translated into proteins by ribosomes. This is called the central dogma (DNA RNA Proteins).
During cell division, the DNA is replicated into two copies and each copy goes to each of the two daughter cells preserving, more or less, the same genetic code to the new cells.
Vitamins C and E are antioxidants that protect against attack by oxidants. The antioxidant vitamin needs to snuggle up to the polyunsaturated fatty acid. Predict which antioxidant vitamin will be better at doing this.
Answer:
Vitamin E
Explanation:
Vitamin E is a fat-soluble nutrient present in many foods. In the body, it acts as an antioxidant, by helping to protect cells against damage caused by free radicals. Vitamin E will have greater antioxidant power than Vitamin C, since it is fat soluble, which will allow it to be combined with fatty acids more easily.
Vitamin E is better at snuggling up to polyunsaturated fatty acids compared to Vitamin C.
Explanation:Both Vitamin C and Vitamin E are antioxidants that protect against attack by oxidants. However, in terms of snuggling up to polyunsaturated fatty acids, Vitamin E is better at doing this.
Free radicals react with lipoproteins and unsaturated fatty acids in cell membranes, removing an electron from those molecules and generating a new free radical. Antioxidants react with free radicals to stop these chain reactions. Vitamin E forms a more stable molecule or a less reactive free radical and thus prevents the oxidative degradation of lipids.
In contrast, Vitamin C primarily works in the aqueous (water) phase of cells and is not as effective in directly interacting with unsaturated fatty acids.
Your grandmother is very impressed with the size of the tomatoes from a plant that she planted in her garden. These tomatoes are ten times bigger than the average tomatoes. She said that she will collect the seeds from the tomatoes from that plant and re-plant them so she can get more plants with big tomatoes. From the information that you learned in class you know that the plants will produce the same kind of tomatoes if ______
Answer: The blank can be filled correctly by "if the seeds contain the gene or allele responsible for large size of the tomatoes"
Explanation:
In plants also, characters or traits of characters are defined by genes. Different alleles produce different traits of the same character.
For example, in classic Mendelian genetics, T was the allele responsible for tall plant trait while t was the responsible for dwarf trait.
Similarly, there would be a gene(s) responsible for size of the tomatoes. In addition, seeds are the products of sexual reproduction of plants. So, they may carry genetic combination different from parent plants (due to meiosis, crossing over, independent assortment, et cetera).
So, if the seed contains the gene or allele responsible for large size of tomatoes then only they will produce same kind of tomatoes.
Ideally, the nasal septum will devide the nasal cavity equally, but it is common for this partition to be slightly off center. A deviated septum, however, is a condition in which the nasal septum is shifted significantly away from the midline. Explain how this abnormality may cause difficulty in breathing.
Answer:
A deviated septum occurs when bone and the cartilage that divides the nose septum become off-center which results in two unequal nasal septum. This makes one nasal chamber smaller and another larger.
This abnormality causes difficulty in breathing because of the congestion and blockage of the smaller nasal cavity. Due to this congestion airflow in the lungs is hindered which results in lack of oxygen and difficulty in breathing.
Apart from difficulty in breathing it can leads to nose bleeding, loud snoring during sleep, facial pain, headache, and in respiratory infections breathing become more difficult.
A deviated septum can develop due to some trauma or during surgery but some people are born with this abnormality.
The nasal septum is a structure that separates the nasal cavity into two halves. A deviated septum, a condition where the nasal septum deviates significantly from the midline, can cause difficulty in breathing by impeding normal airflow, particularly during exertion.
Explanation:The nasal septum is a flat, midline structure that separates the nasal cavity into two halves. It is formed by the perpendicular plate of the ethmoid bone, vomer bone, and septal cartilage. The septum contributes to the moistening and warming of air as it enters the nose, due to the surfaces of the conchae and the nasal mucosa.
When the nasal septum is significantly deviated from the midline in a condition known as a deviated septum, it can impede normal airflow, resulting in difficulty breathing. This happens because the deviation can block one side of the nose, reducing airflow and making it more difficult for air to pass freely through the nasal passages. This is especially noticeable during exertion when a higher volume of air is required.
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In Biology, the term community is used to describe the broadest level of biological organization. how living things interact with their non-living environment. the smallest level of biological organization. how two or more species interact with one another. how individuals of the same species interact with one another.
Answer:
The term community is used to describe how two or more species interact with one another
Explanation:
According to biology, a community is made up of all the species of all the organisms that inhabit a certain area or an ecosystem. By studying a community, all interactions between species are analyzed, for example depredation and mutualism.
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Cells store energy when:
A.) Ions are released into the bloodstream.
B.) They break down sucrose to glucose and fructose.
C.) A third phosphate group is bonded to an ADP molecule
D.) The third phosphate group breaks off from an ATP molecule.
Answer:C
Explanation:
Cell energy is stored when a phosphate group attaches to an ADP molecule.
How do cells store and release energy?• Adenosine triphosphate (ATP), also known as a cell's “energy currency, " is an essential molecule for a living cell.
• When a cell requires energy to perform any function, ATP splits off a phosphate from itself, resulting in the formation of adenosine diphosphate (ADP) and a phosphate. The energy released during the process of splitting ATP molecules is utilized to perform any cellular function.
• Similarly, when a cell has extra energy, it attaches a phosphate back to the ADP molecule. The process of the energy cycle can be shown as: ADP + P ⇔ ATP
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True or False. The growth rate of a certain population increases very quickly for a time and then levels after zero the most likely reason for the growth rate level after zero is that the population reach the carrying capacity of the environment.
Answer:
False
Explanation:
Answer:
Exponential population growth: When resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve. ... In logistic growth, population expansion decreases as resources become scarce. It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.
Explanation:Exponential population growth: When resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve. ... In logistic growth, population expansion decreases as resources become scarce. It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.
Small channels that form across the plasma membranes of adjacent cells
Answer:
Gap junctions
Explanation:
They allow adjacent cells to communicate. These channels form a close connection between cytoplasm because small molecules such as ions are able to pass through from cell to cell. Examples of cells with gap junctions are cells in heart muscle tissues. Gap junctions are found in animal cells and are akin to plasmodesmata in plant.
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.a) as a method of the extraction of minerals, it was well establishedb) as a method of the extraction of minerals well establishedc) was a well-established method of mineral extractiond) was a well-established method of extracting mineral that wase) had been a method of mineral extraction, well established
"The correct option is c. was a well-established method of mineral extraction.
The sentence provided in the question is complex and requires a choice that fits grammatically and contextually. The sentence is discussing the historical context of leaching as a method for extracting copper, emphasizing that while the method was known, the role of bacteria was not understood until approximately 25 years ago from the time of writing. Let's evaluate the options: a) as a method of the extraction of minerals, it was well established - This option creates a non-restrictive clause with the commas, which is not incorrect, but it is somewhat awkward and less precise than the best answer. b) as a method of the extraction of minerals well established - This option is grammatically incorrect because it lacks a verb to connect ""as a method"" with ""well established."" c) was a well-established method of mineral extraction - This option is grammatically correct and clearly conveys that leaching was a recognized method for extracting minerals in the past. It fits the context of the sentence by indicating that the method was established before the discovery of bacteria's role. d) was a well-established method of extracting mineral that was - This option is incorrect because it ends with ""that was,"" which is grammatically incomplete and does not make sense in the context of the sentence. e) had been a method of mineral extraction, well established - This option uses the past perfect tense ""had been,"" which is not necessary since the simple past tense ""was"" suffices to indicate that leaching was established before the discovery of bacteria's role. Additionally, the comma before ""well established"" is unnecessary and disrupts the flow of the sentence. Therefore, option c is the most concise and grammatically correct choice that accurately reflects the intended meaning of the sentence."
What is the structural feature that allows dna to replicate?
Answer: Its double helix structure.
Explanation:
Double helix structure during DNA replication unwinds by helicase enzymes. This allows transcription to occur where both DNA strands serves as a template for precise copying of genes or nucleotide bases. Double helix structure also provides stability and most importantly accurate storage of information in DNA.
DNA replicates thanks to its double helix structure, where complementary base pairing allows strands to serve as templates for new strands. Enzymes like helicases, topoisomerases, and DNA polymerase, facilitate the unwinding and synthesis of DNA, ensuring high fidelity replication.
Explanation:The structural feature that allows DNA to replicate is the complementary base pairing of its double helix structure. The double helix is held together by a cumulative effect of millions of hydrogen bonds between nitrogenous bases, which, despite their collective strength, are relatively weak individually. This weak bonding allows the strands to unzip easily during replication. During this process, each strand can act as a template for the synthesis of a new complementary strand, a mechanism that is both simple and effective for preserving genetic information and facilitating high fidelity in DNA replication.
Important enzymes such as helicases and topoisomerases are involved in unwinding the double helix and relieving supercoiling, making the DNA accessible for replication. Another key enzyme is DNA polymerase, which adds new nucleotides to the growing strand but requires a primer to initiate the process. This semi-conservative mechanism of replication, where each new DNA molecule contains one parental and one new strand, ensures that each daughter cell receives an accurate copy of the DNA following cell division.
The ability to reproduce results is an important part of any
The ability to reproduce consistently refers to how organisms reproduce to ensure the continuation of their species. It plays a crucial role in biology, ensuring the transfer of genetic material from parents to offsprings and promoting genetic diversity.
Explanation:The ability to reproduce results or more specifically, reproduce consistently, is primarily a principal of experimental science including Biology, Physics and Chemistry. In the context of Biology and the information given, it refers to how all forms of life, from single-celled organisms to complex multicellular organisms, have the ability to reproduce. Reproduction, either asexual or sexual, allows for the transfer of genetic material from parent organisms to the offsprings. This transfer of genes ensures the continuation of species. For example, sexual reproduction creates a genetic diversity in offsprings, which equips them better for survival.
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Which of the following is a good scientific hypothesis?
A) Gasoline is made up of particles that can not be seen.
B) If a plant is give less oxygen than what is present in the air, the plant will grow more slowly
C) People who smoke cough more often.
D) More people carry laptops at the airport on Tuesdays then on Saturdays.
Jennifer’s children have always been short when compared to their classmates. One day her son blurted out, "I can’t wait until I’m in college because I’ll be really tall by then!" Her daughter chimed in with, "Me, too!" Jennifer knew she needed to tell them that after puberty: _________
Answer:
Both her son and daughter will be shorter than their classmates.
Explanation:
According to the given information, both the son and daughter of Jennifer are shorter than their classmates. The onset of puberty (10-14 yrs for girls and 12-16 yrs for boys) is marked by the exit from the growth phase and the beginning of the reproductive phase.
Humans exhibit exclusive growth and reproductive phages in the life cycle. Before the onset of puberty, growth hormone is released from anterior pituitary which in turn is responsible for is responsible for growth such as an increase in height of children.
Growth hormone directly targets the metabolism and increase the rate of metabolism. It increases the uptake of nutrients from the blood and their storage as proteins and DNA for growth to support the cell division and deposition of the matrix of bone tissues. The main target of growth hormone is bone and skeletal muscles.
The onset of puberty is marked by the release of sex hormones in males and females. This is the phase of attainment of sexual maturity and the development of secondary sexual characters. There is no growth of bones and muscles after puberty.
Algae in the genus Caulerpa typically grow to a length of over half a meter and have structures similar to stems, leaves, and roots. Reproduction occurs when adults produce sperm and eggs that fuse to form offspring. Each adult Caulerpa consists of just a single cell, however. Evaluate the following sentence and determine whether it is true or false. Explain your answer."Caulerpa must be a prokaryotic organism because one individual is made up of a single cell."
Answer:
Being an unicellular organisms has no relationship with being prokaryotic. The main prokaryotic feature is having the DNA free in the cytoplasm, or not surrounded by a membrane. Also most of the the time (but not always) gametes are produced by meiosis which is a type of cell division that is exclusive of eukaryotes.
A point in development when organisms are particularly susceptible to certain kinds of stimuli in their environments, but the absence of those stimuli does not always produce irreversible consequences. A. Critical PeriodB. Sensitive PeriodC. Embryonic PeriodD. Assimilation
The correct answer is B. Sensitive period
Explanation:
In development, the sensitive period refers to a lapse of time in which organisms are more susceptible or receptive to stimuli and therefore during this time there can be great advances in development. Additionally, different from critical periods sensitive periods do not imply irreversible consequence if the stimuli are not presented. For example, in human beings from birth to the age of 6 years, children are more receptive to learn and acquire certain skills such as learning a new language if exposed to it and therefore this can be considered as a sensitive period. Considering this, it can be concluded the definition presented refers to the Sensitive period.
In a species of snail, dark-shelled individuals are better hidden from bird predators in the shady forest, while light-shelled individuals are better hidden in well-lit brushy edge areas. If there were no areas of intermediate brightness in this habitat,which type of selection would act on shell color in these snails?
Answer:
Disruptive Selection
Explanation:
Disruptive selection is the type of natural selection wherein two extreme phenotypes are favored due to their survival and reproductive success over the intermediate phenotype. It results in two peaks of distribution in the normal distribution curve.
In the given example, two extreme phenotypes with respect to the shell color of snails are favored in two different habitats. Dark shelled snails exhibit survival advantage in the shady forest while the light shelled snails are favored in well-lit habitats.
Since two extreme shell colors are favored over the intermediate-range by natural selection, it represents disruptive selection.
Put the following steps of Koch's postulates in order:
A. The suspected infectious agent must be isolated and grown outside the host.
B. The suspected infectious agent causes the disease when it is introduced to a healthy, experimental host.
C. The suspected infectious agent must be found in every case of the disease.
D. The suspected infectious agent must be found in the diseased experimental host.
Answer:
Koch's postulate correct order is - C, A, B, D.
Explanation:
Koch's postulates are given by Robert Koch a german bacteriologist and physician to form criteria to identify that if a particular is able to cause a disease or epidemic or not. It helped in bringing scientific clarity to this field.
The suspected infectious agent must be found in every case of the disease.
The suspected infectious agent must be isolated and grown outside the host.
The suspected infectious agent causes the disease when it is introduced to a healthy, experimental host.
The suspected infectious agent must be found in the diseased experimental host.
Thus, the correct order is - C, A, B, D.
Originally, there was concern that sealants would trap bacteria in the pit and the caries would proliferate. However, researchers are now experimenting with sealing interproximal incipient caries.
True / False.
Answer:
True
Explanation:
Originally, there was concern that sealants would trap bacteria in the pit and the caries would proliferate. However, researchers are now experimenting with sealing interproximal incipient caries.
Dental sealants are usually placed on the chewing (occlusal) surface of the posterior permanent teeth - molars and premolars - to help protect them against caries. This is because the chewing surfaces of the molars and premolars have grooves that make them vulnerable to tooth decay. These depressions can be deep, making cleaning difficult in these areas. Bacterial plaque builds up in these grooves and the bacteria acid from this enamel deminerization plaque develops caries. Fluoride helps to prevent tooth decay and to protect tooth decay surfaces and sealants, fill the grooves, thus preventing food from becoming trapped in the region and causing tooth decay, ensuring superior protection for teeth with deep grooves.
The statement is true. Initially feared to trap bacteria, sealants are now experimented with for managing interproximal incipient caries, supported by research on their effectiveness in preventing caries progression.
The statement 'Originally, there was concern that sealants would trap bacteria in the pit and the caries would proliferate. However, researchers are now experimenting with sealing interproximal incipient caries' is true.
Initial Concerns:
Originally, there was a worry that applying sealants to the pits and fissures of teeth might trap bacteria underneath the sealant.The concern was that this trapped bacteria would continue to grow and cause the caries to worsen.Research Developments:
Subsequent research has demonstrated that sealants can be effective even if applied over existing bacteria.Studies have shown that the bacteria trapped under the sealant become deprived of nutrients and oxygen, which inhibits their growth and activity.Effectiveness in Caries Prevention:
Sealants are effective in preventing the progression of early caries, also known as incipient caries.The sealing material creates a barrier that protects the enamel from further demineralization and decay.Interproximal Incipient Caries:
Researchers are now experimenting with using sealants to manage interproximal incipient caries, which are early-stage caries found between the teeth.This approach aims to arrest the progression of these early caries and prevent the need for more invasive treatments like fillings.Clinical Evidence:
Clinical evidence supports the use of sealants to manage and prevent the progression of both occlusal (on the biting surfaces) and interproximal caries.The application of sealants has become a recognized preventive measure in modern dentistry.Preventive Dental Strategy:
The use of sealants is part of a broader preventive strategy to maintain oral health and reduce the incidence of cavities.This preventive measure aligns with the shift towards minimally invasive dentistry, focusing on preserving natural tooth structure.In conclusion, the statement is true because initial concerns about sealants trapping bacteria have been addressed by research showing that sealants can prevent the progression of caries.
Which part of the compound light microscope is used to change magnification? Please provide an explanation along with your answer.
A.) Part A
B.) Part C
C.) Part E
D.) Part F
Answer:
Part C
because rotating the 3 knobs will increase magnification for more or less visibility depending on what you want to see relating to the size of the microscopic or eye-visible image.
The part of compound light microscope that is used to change magnification is Part C. That is option B.
A compound light microscope is an instrument that is used to magnify an image thereby separating it into minute details.
The light microscope has two sets of lenses:
The objective lens:The eye piece lens:The objective lens which is the part labelled C is used to change the magnification of the image of an object. This is done by selecting the desired magnification through the rotation of the nose piece.
Most light microscopes have two or three objective lenses attached to a rotating nose piece. These lenses usually are 5x, 10x, 40x, 100x. This means that a 10x lens magnifies the image of the object by 10 times.
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Which of the following is not a feature of the anatomical position:
a. The body stands erect.
b. The body is facing forward.
c. The arms are hanging at the sides.
d. The heels and feet are together.
The following, which is not a feature of the anatomical position, is the heels and feet are together. The correct option is d.
What is an anatomical position?An anatomical position or standard anatomical position of the body is when the body is standing straight, facing forward and the hands are at the sides. This is to show the scientific position of body parts with respect to the body.
The main characteristics of anatomical position are the body standing erect and facing forward, and the arms are hanging, but the feet are not together.
Thus, option d. The heels and feet are together, is correct.
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Two species of clams inhabit the same marine habitat along the Atlantic coast. One releases gametes into the water in early spring, and the second species releases gametes into the water in late summer. Which type of reproductive barrier is at work between these species?
Answer:
Temporal Isolation
Explanation:
The mechanisms of reproductive isolation that work before zygote formation are categorized as pre-zygotic isolation mechanisms. One such mechanism is the temporal isolation.
Here, two diverging populations exhibit differences in the timing of reproduction so as to prevent the possible interbreeding between them.
In the given example, two species of clams present in the same habitat prevent interbreeding among themselves as they release their gametes at a different time of year. One species release gametes in water in early spring while the other does the same during late summer.
Since gametes are not released at the same time, they cannot fuse together and interbreeding is not possible between the given two species.
.RNA molecules physically link the mRNA message and the _______ it encodes for.
Answer: DNA molecule
Explanation: The RNA is a molecule very important for the process cellular, in charge of moving the genetic material present into DNA to synthesize proteins through of RNAm
RNA molecules physically link the mRNA message and the amino acids it encodes for.
Explanation:This procedure uses transfer RNA particles to convey amino acids to the ribosome, where ribosomal RNA at that point joins amino acids together to shape coded proteins.
Ribonucleic acid or RNA is polymeric molecule fundamental in different biological aspects in regulation, expression, coding, and decoding of the genes. DNA and RNA are nucleic acids, and, alongside carbohydrates, proteins, and lipids comprise the four significant macromolecules basic for every single known type of life.
Suppose that you performed a version of the Hershey and Chase experiment, this time using 32P-labeled viruses that insert their double-stranded DNA into the DNA of the cells that they infect. The viral DNA is then treated as part of the cell's own DNA and is replicated during DNA replication and passed onto daughter cells when the cell divides. You infect a population of cells with the 32P-labeled viruses, and then let the infected cells go through two generations of cell divisions. If you then examine the cells, you should find 32P-labeled DNA in ____ of the cells.
Answer:
1/2 of the cells.
Explanation:
DNA replication is a semiconservative process which means that one strand of each of the two DNA double helices formed after one round of DNA replication is the parental strand and the other one is the newly formed strand.
Given that a population of the cells was infected with 32P-labeled viruses which would insert its DNA into the host cell's DNA, after one generation of cell division, the 32-P labeled DNA would be present in one strand of all the DNA molecules present in all the cells.
After the second generation of cell division, the 32-P labeled parental strand would be present in 1/2 of the total cells while the rest half of the cells would have only the normal DNA.
Final answer:
After infecting cells with 32P-labeled viruses and allowing two generations of cell division, 32P-labeled DNA should be found in half of the cells due to semi-conservative DNA replication.
Explanation:
When you infect a population of cells with 32P-labeled viruses and then let the infected cells go through two generations of cell divisions, we must consider how DNA replicates and is passed on to daughter cells. As DNA replication is semi-conservative, each new cell will receive one original (labeled) and one new (unlabeled) strand of DNA after the first division. After two divisions, assuming no errors or mutations, each cell will have either one strand of 32P-labeled DNA (from the first generation cells that had one labeled and one unlabeled strand) or no labeled DNA (from the first generation cells that had two unlabeled strands).
Therefore, after two rounds of cell division, the 32P label will be distributed among all four possible combinations of daughter cells. Specifically, after the first division, all cells will have 32P-labeled DNA, but after the second division, only half of the resulting cells will contain 32P-labeled DNA because each cell divides into two, with only one inheriting the labeled DNA template. As a result, you should find 32P-labeled DNA in half of the cells after two generations of cell division.
Can you use species area curve to estimate extinction?
Answer:No
Explanation:To put the issue finally to rest, ecologists need to develop a general theory for estimating species extinction from species–area relationships. ... Second, while “extinction debt” is a valid and important concept in conservation biology, the backward SAR method is not the correct model for measuring the debt.
When moose initially colonized Isle Royale, they encountered an environment that lacked predators and had ample food sources. At this time point, the initial number of moose was also well below the carrying capacity of Isle Royale. As a result, it is likely that the moose population of Isle Royale initially demonstrated _____ growth.
Answer:
exponential
Explanation:
According to my research on different types of growth factors, I can say that based on the information provided within the question they initially demonstrated exponential growth. The refers to something that is growing at an alarming rate because all factors around it are in it's favor, which in this situation since there were no predators and an abundance of food the Moose had perfect conditions to thrive.
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The glycocalyx: binds solutes and transports them across the plasma membrane. is bound to the inner or outer surface of the plasma membrane and is easily separated from it. contains pores or channels through which water and solutes may pass. binds to extracellular structures and is important in cell recognition and lubrication of the cell surface.
Answer:
Binds to extracellular structures and is important in cell recognition and lubrication of the cell surface.
Explanation:
They form a peri-cellular matrix around the cell and is observed as a fuzzy cell coat under a microscope. Glycocalyx molecules are mostly made up of carbohydrates bonded with lipids and proteins. They are significant in cell adhesion especially in tissues and for protection in prokaryotes. These molecules are also important in cell-to-cell communication and recognition.
What is meant by "gaps" within living things or fossils? 1. missing links
2. a distinct and obvious lack of transition between all higher levels of taxa
3. specimens representing evidence for evolutionary transitions
Answer:
Option (1)
Explanation:
The missing link refers to those fossils that are believed to be connecting two separate groups of organisms in their stages of evolution. They had the characteristics of both the group of organisms. These are the extinct species, and only the traces of it are found to be embedded in some rocks. So there is no proper evidence that supports their existence in the past.
They are considered to be hypothetical, diminished organisms that occur during the evolutionary stages of a group of organism. They are also known as the 'gaps' within living things or fossils.
Thus, the correct answer is option (1).
Which of the following is NOT an example of biotechnology?
a) Bacterial production of vinegar
b) Bacterial production of yogurt
c) Bacterial production of human insulin
d) Bacterial production of French bread
e) Bacterial degradation of a dead animal
I think its A) Bacterial production of vinegar...