Answer:
Answer is B.
Explanation:
What would indicate that a corpse had been dead between 2-8 hours?
why do newly discovered species live in remote, hard to reach places?
Newly discovered species often inhabit geographically isolated areas because these unique environments allow them to evolve and retain their distinctive traits over time. These remote locations also provide the necessary isolation for new species to develop. However, these species are often endangered due to rapid habitat loss.
Explanation:Newly discovered species often inhabit remote, hard-to-reach places because these geographically isolated areas provide unique environments where species can evolve without much interruption or competition. Examples of this can be seen in places like Hawaii and New Guinea, where unique patterns of species distribution are found due to geographical isolation. In these secluded areas, species are capable of retaining their unique characteristics over time as they remain separated from other species.
Another factor is the element of endemism. Many geographically isolated areas such as islands or high-elevation habitats provide the isolation necessary for new species to develop and adapt. Due to the isolation of their habitats, many of these species have been able to escape detection until they are discovered by scientists.
However, it's important to note that while these environments allow for unique speciation, they also pose threats to these endemic species. As most new species are often found in rapidly shrinking tropical forests, these unique living organisms are frequently threatened by extinction due to human activities and environmental changes.
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A client is currently experiencing panic. which acation would be most appropriate for the nurse to do?
What are the 4 steps to purify DNA from a cheek swab.
The four steps to purify DNA from a cheek swab are as follows:
Collect the cells from the required site, i.e. Cheek swab.Break or disrupt the cell in order to release DNA content.Now, separate this content of DNA from proteinaceous constituents.Isolated the required DNA with the phenol-chloroform method. What is DNA purification?DNA purification may be defined as a type of process through which various physical and chemical methods are utilized in order to separate DNA from cell membranes, proteins, and other cellular components.
DNA extraction is carried out by organic extraction which is known as phenol-chloroform methods and non-organic extraction which is known as salting out and proteinase K treatment. Apart from these two most common methods, other methods are also utilized for the same.
Therefore, the four steps of DNA purification from a cheek swab are well described above.
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what two chromosomes do males have for gender
x and y chromosomes is correct
What forms during the zygote period to cushion and protect the zygote?
Answer:
A zygote is the union of the sperm cell and the egg cell. Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo
Explanation:
What are the 2 different kind of t-cells and what is their jobs?
Answer:
Helper T cells
Killer T cells
Explanation:
The two main types of T cells are –
a) Helper T cells
b) Killer T cells
The function of these two cells is as follows –
a) Helper T cells – These act as messenger for the immune system of the body. They don’t do anything by themselves but through chemical messaging they pass on the information to other cells of the immune system.
b) Killer T cells – These cells find and attack the infected cells. They are able to distinguish between the healthy cell and infected cell.
What substance is a source of chemical potential energy that animal cells can use
What type of bonding exists in network solids?\?
Trypsin is an enzyme that hydrolyzes(1)______________ into smaller subunits called(2)________________. the gelatin contained this substance. steapsin is an enzyme that hydrolyzes(3)_________into smaller subunits called (4)________________ & (5)_____________________. phenol red is a color indicator that turns what color in the presence of an acid? (6)_________________.
Trypsin is an enzyme that is present in pancreatic juice. It helps to digest proteins and break them down into something that can be absorbed by the body. It is an enzyme that hydrolyzes(1)peptide bonds into smaller sub-units called (2)oligopeptides and dipeptides, which are further hydrolized into amino acids to make them available for absorption into the blood stream.
Steapsin is also an enzyme in pancreatic juice or is a pancreatic lipase called triacylglycerol lipase. It catalyzes the breakdown of fats. It is an enzyme that hydrolyzes (3)fats into smaller sub-units called (4)fatty acids & (5)glycerol. Phenol red is a pH indicator that can determine the presence of acids. It is a color indicator that turns turns (6)yellow in the presence of acid.
Four strategies have been proposed to increase the world's food supply in places where populations are underfed
One is the diversification of food sources. Second is increasing agricultural production by implementing good agricultural practices and adopting contemporary technologies such as Genetically Modified Foods. The third is increased exports to these counties with undefined populations. Fourth is embracing good agricultural land management practices such as reducing land fragmentation/subdivision so as to promote large-scale production.
A(n) _______ is a characteristic arising from genes located on chromosomes that are not gender-determining.
genotype
allele
sex-linked trait
autosomal trait
I'll award medals. :)
Blood leaving the heart for the body passes through a large blood vessel called the __________. vena cava pulmonary vein aorta pulmonary artery
Answer:
Explanation:
Aorta is right the answer.
Which of the following following terms best describes air?
A)element
B)compound
C)mixture
D)none of the above
Final answer:
Air is best described as a mixture, specifically a homogeneous mixture, with its components uniformly mixed at a molecular level and varying in composition. The correct option is C.
Explanation:
The term that best describes air is C) mixture. Specifically, air is a homogeneous mixture, which means that the different components that make up air (primarily nitrogen, oxygen, and other gases like argon and carbon dioxide) are mixed uniformly at a molecular level. Unlike a compound or an element, the composition of a mixture can vary, and its components can be separated by physical means, though not simple mechanical means like sorting or filtering.
Elements are pure substances that cannot be broken down into simpler substances by chemical means. An example of an element would be iron, which is purely composed of iron atoms. A compound is made up of two or more elements chemically bonded together in a fixed ratio, such as water (H₂O), which consists of hydrogen and oxygen combined in a 2:1 ratio.
I need help on a Biology practice please?
1. A unicellular organism with no nucleus is a (1 point)
2. The type of infection in which a virus does not immediately start replicating itself, but inserts a piece of DNA into the host cell’s genome which becomes activated at a later date is called a (1 point)
3. A spiral or corkscrew-shaped prokaryote is called (1 point)
4. The thick internal wall that can enclose a prokaryote’s DNA and some cytoplasm when conditions are unfavorable is called a (1 point)
How does the size of a landmass relate to species diversity? the size of a landmass is unrelated to species diversity. larger landmasses have less diversity. larger landmasses have greater diversity?
larger landmasses have greater diversity
Answer:
larger landmasses have greater diversity
Explanation:
How does the size of a landmass relate to species diversity? the size of a landmass is unrelated to species diversity. larger landmasses have less diversity. larger landmasses have greater diversity?
A landmass is actually the environment which species live. Greater land masses have greater specie diversity . diversity in the sense that there are similarities and differences. E.g A desert in Africa can have lions, zebras, insects etc
C. larger landmasses have greater diversity is suitable
How much percent of biodiversity on land will be lost if all rain forests are destroyed?
An adult client is brought to the emergency department by a friend who states, "we were all partying at a club, and all of a sudden my friend collapsed." vital signs revealed a temperature of 99.2° f, pulse of 152, respiratory rate of 32, blood pressure of 163/92. after performing a physical assessment and collecting a health history from the client, what action should the nurse take next?
Answer:
In the given case, the appropriate nursing step would be to inform the healthcare provider regarding the status of the client and to prepare for the beginning of an intravenous line. Ecstasy refers to a drug of abuse, which exhibits both hallucinogenic and stimulant characteristics.
Stimulants possess the tendency to result in dehydration by enhancing the activity and diaphoresis via enhanced release of adrenaline. The client is showing signs of dehydration, and the healthcare provider must be notified as soon as possible so an IV can be prescribed.
The variation of kernel color in corn plants is an inheritated trait. R is the dominant allele for red kernels in a corn plant and r is the recessive allele for yellow kernels. What is the probability that a corn plant withe the genotype Rr crossed with a corn plant rr will have offspring with the genotype r? Express your answer as a fraction
The probability of getting an offspring carrying the rr (yellow kernels) genotype from a cross between Rr and rr parent corn plants is 1/2 or 50%.
Explanation:The probability that a corn plant with the genotype Rr crossed with a corn plant rr will have offspring with the genotype rr can be calculated using a Punnett square analysis. When we cross Rr (heterozygous red) with rr (homozygous yellow), we find that one of every two offspring (or 1/2) will be Rr (red) and one of every two will be rr (yellow). So, the probability for the offspring to have the genotype rr (yellow kernels) is 1/2 or 50%.
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When performing rescue breathing, be sure to always ____ the head before performing breaths?
When performing rescue breathing, be sure to always tilt the head before performing breaths. Tilting the head is an essential step in rescue breathing to ensure an open airway.
By gently tilting the head backward, it helps to align the airway and prevent any obstruction that could hinder the flow of air. This position helps to clear the air passage and make it easier to deliver rescue breaths. It is important to maintain an open airway during rescue breathing to ensure effective ventilation and oxygenation.
When performing rescue breathing, tilting the head is an important step in the process of ensuring a clear and open airway. The head tilt-chin lift maneuver is commonly used to achieve this.
When a person is unconscious or unresponsive, their muscles may relax, including those in the neck and throat. This relaxation can cause the tongue to fall backward and block the airway, making it difficult for air to pass through.
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When a neuron's membrane is at rest, the concentration gradient tends to move potassium ____ the cell and the electrical gradient tends to move it ____ the cell?
Where would you find humus in this photograph
Answer: On the top of the dark band
Humus is a dark organic matter in the soil produced by the decomposition of the dead plants, animals and their traces.The humus develops mainly by the plant litter, when the plants drop their leaves, twigs and other materials piles up and degraded and decomposed by the soil microbes. Humus can be produced naturally or by the process of composting. The humus makes the soil fertile, it is a rich source of nutrients hence, supports growth and development in plants.
In the given picture the dark layer on the top of the soil horizon represents humus.
4. Which is the mRNA made during transcription of the following DNA template?
-G-C-T-T-A-G-T-C-C-A-T-T-
(1 point)
a. -C-G-A-A-U-C-A-G-G-U-A-A-
b. -C-G-U-U-T-C-U-G-G-T-U-U-
c. -C-G-A-A-T-C-A-G-G-T-A-A-
d. -C-G-T-T-U-C-T-G-G-U-T-T-,
The mRNA sequence obtained by transcribing the DNA '-G-C-T-T-A-G-T-C-C-A-T-T-' is '-C-G-A-A-U-C-A-G-G-U-A-A-', which corresponds to option A. This transcription process involves replacing each DNA nucleotide with its mRNA counterpart.
Explanation:The process of transcribing DNA into mRNA involves replacing thymine (T) with uracil (U). So, to determine the sequence of the mRNA strand that forms during the transcription of the provided DNA template, every G in the DNA strand is replaced by C in the mRNA, every C is replaced by G, every T is replaced by A, and every A is replaced by U. Thus, the correct mRNA sequence for the DNA sequence '-G-C-T-T-A-G-T-C-C-A-T-T-' is '-C-G-A-A-U-C-A-G-G-U-A-A-' , which is option A.
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A surgical client is receiving a neuromuscular junction (nmj) blocker. the nurse knows that the client cannot move because the client's acetylcholine receptor sites have been stimulated and the drug is remaining in the receptor sites, preventing repolarization. what medication is this client receiving?
The students in Mrs. Cosby's class were observing worms. The students wanted to find out if a worm's body weight is related to how much food it eats. For their experiment, the students set up five containers in the same place, each with the same type of worm. They measured the starting weight of each worm before they began, and then offered the same amount and type of food to all the worms. What data must they collect during their experiment?
To answer the question, the students should collect data on the starting weight of each worm and measure their weight again after offering them the same amount of food.
Explanation:The students in Mrs. Cosby's class want to find out if a worm's body weight is related to how much food it eats. To answer this question, they should collect data on the starting weight of each worm before they begin the experiment. They should also measure the weight of each worm again after offering them the same amount and type of food. By comparing the starting and ending weights, they can determine if there is a relationship between the worm's body weight and the amount of food it eats. Comparing the starting and ending weights will help determine the relationship between a worm's body weight and the amount of food it eats.
The four bases contained in dna are _____. the four bases contained in dna are _____. cytosine, guanine, thymine, uracil adenine, guanine, purine, thymine adenine, guanine, uracil, thymine adenine, guanine, cytosine, thymine
Answer:
The correct answer is Adenine, thymine, guanine, cytosine.
Explanation:
Select all that apply. You can identify or classify archaea and eubacteria by _____.
If you wanted to try and identify or classify archaea or eubacteria, you would study their habitat, study their genetic make-up, study their shape and arrangement, conduct Gram staining, study how they gain energy and nutrients and study how they move. Archaea and eubacteria are genetically different; Archaea have more complex RNA polymerases that contain multiple polypeptides while eubacteria have simple RNA polymerases that contain four polypeptides. Archaea cell walls do not contain peptidoglycan while almost all bacteria cell walls contain peptidoglycan.
Nicotine from cigarette smoke acts as a ligand and associates with specific cells in the nervous system. nicotine eventually produces feelings of pleasure and well-being. below are the events that happen in the cellular response to nicotine. place the events in the correct order to describe the steps in the signaling pathway.
a. the acetylcholine receptor is an ion channel, and, when a ligand binds, the ion channel opens.
b. an influx of ions carries the signal to the reward areas of the brain.
c. nicotine binds to the transmembrane protein that normally binds the neurotransmitter acetylcholine.
d. the signal causes release of dopamine in the brain, which causes good feelings.
e. nicotine is quickly eliminated from the body (causing cravings for more cigarettes to produce good feelings). c, d, b, a, e a, d, b, c, e nicotine is quickly eliminated from the body (causing cravings for more cigarettes to produce good feelings). c, a, b, d, e b, a, c, d, e
The sequence of events is c, a, b, d, e. This defines nicotine dependence /addiction. A person with nicotine dependence cannot stop smoking even when their health deteriorates. Withdrawal symptoms associated with nicotine dependence include; lightheadedness, anxiety, problems focusing, slow pulse, and mood depression.
Nicotine binds to acetylcholine receptors, opens ion channels causing an influx of ions, which leads to dopamine release and pleasurable feelings, and is quickly eliminated causing cravings for more cigarettes.
This detailed answer explains the correct order of events in the cellular response to nicotine in the signaling pathway.The correct order of events in the cellular response to nicotine in the signaling pathway is:
c. Nicotine binds to the transmembrane protein that normally binds the neurotransmitter acetylcholine.a. The cholinergic receptor functions as an ion channel that opens in response to ligand binding.b. The signal is sent to the brain's reward regions by an influx of ions.d. The signal triggers the brain's dopamine release, which results in positive emotions..e. The body rapidly rids itself of nicotine, which leads to desires for more smokes to feel good.The major effect of genetic drift is A) a reduction in genetic variability. B) a increase in genetic variation to accommodate changes in abiotic conditions. C) no change in population size but an increase in favorable alleles. D) a reduction in population size and an increase in genetic variability.
Answer:
The correct answer would be A) a reduction in genetic variability.
Genetic drift refers to the random event by which the allele frequencies in a population get changed.
It is mainly caused by sampling error in selecting alleles to be passed on to the next generation.
It usually results in the loss of genetic variation due to the death of organisms which are carrying the variable alleles.
It has major effects on the genetic variation when it is complemented with a bottleneck effect or founder effect.
Answer:
a
Explanation:
A client comes to the emergency department with pressure in the chest and shortness of breath. the client is admitted for observation after receiving a tentative diagnosis of a myocardial infarction. which assessment finding should the nurse monitor for in this client that supports this diagnosis?