Final answer:
The example of commensalism among the given options is a bee hive located in a hollow tree. In this scenario, the bees benefit from the shelter without causing harm to the tree, which represents the essence of a commensal relationship between two species.
Explanation:
The description of commensalism in the context of bee hives would be a hive that is located in a place where the bees can live and thrive without negatively affecting their host structure or environment. An example of this would be a bee hive in a hollow tree. The bees benefit by having a protected place to live and raise their young, while the hollow tree is not harmed by the presence of the bees. The tree simply provides a space for the bees that would otherwise be empty or used by other organisms. In contrast, bee hives located in attics, walls, or garages often cause damage or discomfort to humans, and thus, these scenarios do not represent commensal relationships.
What distinguishes phytoplankton from other kinds of plankton? Why are phytoplankton important?
Answer:
Their ability to manufacture their own food
Explanation:
There are two main types of plankton. this includes phytoplankton and zooplankton. Phytoplankton are different from zooplankton in that these plankton are plant-like and undergo photosynthesis manufacturing their own food. They are also regarded as being autotrophic. They are important in that other organisms including the zooplanktons depends on them for food, hence they can also be categoriZed as producers.
"Phytoplankton are distinguished from other types of plankton primarily by their ability to photosynthesize. They contain chlorophyll and other pigments, which allow them to convert light energy into chemical energy through the process of photosynthesis.
This sets them apart from zooplankton, which are heterotrophic and must consume other organisms for energy, and bacterioplankton, which are primarily decomposers.
The importance of phytoplankton is multifaceted:
1. Oxygen Production: Phytoplankton contribute significantly to the oxygen in our atmosphere. It is estimated that about 50% of the global oxygen production is due to phytoplankton photosynthesis, making them crucial for the survival of aerobic life on Earth.
2. Basis of Marine Food Webs: As primary producers, phytoplankton form the foundation of the marine food web. They are consumed by zooplankton, which in turn are food for larger organisms, including fish, whales, and birds. Thus, they support the immense biodiversity of marine ecosystems.
3. Carbon Sequestration: Phytoplankton play a key role in the global carbon cycle. Through photosynthesis, they absorb carbon dioxide from the atmosphere. When phytoplankton die, some of their biomass sinks to the ocean floor, effectively sequestering carbon away from the atmosphere and mitigating climate change.
4. Regulation of Climate: Phytoplankton can influence climate patterns by affecting the heat distribution in the ocean. They can also impact cloud formation and albedo through the production of dimethyl sulfide (DMS), which can lead to the formation of clouds that reflect sunlight away from the Earth's surface.
5. Economic Value: Phytoplankton are the starting point for many commercially important fisheries. Their productivity affects the abundance and distribution of fish stocks, which are vital for the economies of coastal communities and the broader seafood industry.
In summary, phytoplankton are a critical component of Earth's ecosystems, influencing atmospheric composition, climate regulation, marine biodiversity, and human economies. Their health and abundance are indicators of the overall health of the world's oceans."
What cell types within bone are responsible for the breakdown of bone tissue to permit reabsorption of calcium?
Answer:
Explanation: Osteoclasts are responsible for resorbing bone matrix and releasing key minerals, including calcium, back into the bloodstream. They are stimulated by parathyroid hormone when blood calcium levels are low.
Explanation:
Hope this helps :)
An Emergency Medical Responder reports that a male patient, injured while playing football, has bruising to the lumbar area of the back. Based on this statement, the EMT should expect to find bruising in which area?A) Upper back
B) Neck
C) Lower back
D) Buttocks
Answer:
C) Lower back
Explanation:
The lumbar area is located between the chest, the spine and the sacrum. This area corresponds to the lower back and has five vertebrae: L1-L5. According to this, the answer is that based on this statement, the EMT should expect to find bruising in the lower back.
True or false: An allele is a version of a gene?
Answer:
True
Explanation:
I will give an example. Two plants cross breeds. A pink flower and a red flower. The red flower has a gene for red color and the pink has a gene for pink color. Mix the two together and you have an offspring with two different genes, or alleles, that are either going to be mixed or the plant will be one or the other color.
what r the pros and cons of renewable energy resources
Answer: Pros: It is abundant, and can be used without interruption, cleaner than fossil fuel. Cons: Can result in air pollution, takes a lot of energy to produce, can be seasonable and competes with food production. Landfill gas, solid waste energy comes from harnessing the decomposition of organic material.
Explanation:
Final answer:
Renewable energy resources have pros, such as sustainability and reduced greenhouse gas emissions, but also cons, including lower efficiency and environmental impacts.
Explanation:
Renewable energy resources have several pros and cons. Some of the pros include:
Renewable resources can be replaced as quickly as they are used, making them sustainable in the long run.Renewable energy sources do not produce greenhouse gas emissions or other air pollutants, reducing the impact on climate change.Renewable energy can provide decentralized control over power, allowing homes and businesses to generate their own electricity without relying on a grid.However, there are also cons to consider:
Renewable energy sources tend to have lower efficiency and higher initial costs compared to fossil fuel technologies.Some renewable energy sources, such as wind and hydro, can have environmental impacts, such as habitat disruption and wildlife disturbance.Availability of suitable land, technological limitations, and competition with other energy technologies can affect the future deployment of renewable energy sources.Hypothesize as to why coronaviruses may have glycoproteins in their membranes. What may be the purpose and function of these structures?
Answer:
Viral glycoprotien play important role in virus entry to the cell and virus pathogenicity
They may help viruses avoid the host immune system. Glycoproteins on the surface of the envelope serve to identify and bind to receptor sites on the host's membrane.
Explanation:
Viral glycoproteins play important roles throughout the life cycle of coronaviruses. Viral glycoproteins interact with receptors on the host cell membrane and are required for penetration of the viral genome into cells by fusion of the viral envelope with the plasma membrane or endosomal membrane
The viral glycoproteins participate in assembly of virions, and the intracellular location of viral glycoproteins may determine the location of Coronavirus budding. Viral glycoproteins on the surface of infected cells may permit fusion with adjacent cells, and may make the cell susceptible to immune cytolysis or cell-mediated cytotoxicity, or permit hemadsorption. Epitopes of viral glycoproteins may be recognized by neutralizing, non-neutralizing or hemagglutination-inhibiting antibodies. Thus, elucidation of the structure and functions of Coronavirus glycoproteins is of central importance in understanding the replicative cycle and pathogenesis of coronaviruses.
Final answer:
Glycoproteins in coronavirus membranes serve critical functions in the viral lifecycle, including attachment to host cells, penetration of the cell membrane, replication inside the cell, and release of new virions.
Explanation:
Coronaviruses may have glycoproteins in their membranes to facilitate attachment to host cells. These glycoproteins recognize and bind to viral receptors on the cell surface, allowing the virus to infect specific cell types. For instance, HIV makes use of the CD4 molecule on T lymphocytes. Glycoproteins serve not only for attachment but also play a role in the virus's ability to penetrate the cell membrane, inject its genome, and replicate within the host cell.
Spikes, such as those found on the influenza virus, are extensions of these glycoproteins that allow viruses to both attach and enter a host cell, or detach from it after replication. Known spikes like hemagglutinin (H) and neuraminidase (N) greatly influence the identification and characterization of influenza viruses, denoting specific strains responsible for historical pandemics.
Therefore, these glycoproteins and spikes are vital for the virus's lifecycle, ensuring successful attachment, penetration, replication, and ultimately the release of new virions to infect other cells.
Which actions are involved in the immune response
The steps in immune response are;
RecognitionActivationPhagocytosisAntibody productionT cell activationInflammationCytokine releaseMemory formationWhat is immune response?The immune system identifies and recognizes foreign substances, such as pathogens or antigens, that enter the body. Once recognized, the immune system triggers an immune response by activating immune cells, such as white blood cells (leukocytes), to take action against the invader.
Certain immune cells, called phagocytes (e.g., macrophages and neutrophils), engulf and destroy pathogens through a process called phagocytosis. They recognize, engulf, and break down the foreign particles.
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Do a timeline of the process of formation of fraternal twins started by the oogenensis
Answer:
The process of Faternal twins start when an ovum or egg split into two, and develop into individual babies which are known as faternal twins. Oogenesis is the formation of egg.
Explanation:
After the formation of ovum, it splits.
quizlt testing your comprehen 1. identify which anatomical plane-sagittal, frontal, or transverse-is the only one that could not show (a) both the brain and tongue, (b) both eyes, (c) both the hypogastric and gluteal regions, (d) both kidneys, (e) both the sternum and vertebral column, and (f) both the heart and uterus. understand anatomical
The sagittal plane, which divides the body into left and right halves, is the only anatomical plane that could not show both structures or regions like the brain and tongue, both eyes, hypogastric and gluteal regions, both kidneys, sternum and vertebral column, or the heart and uterus.
Explanation:To answer your question, let's first recall what each anatomical plane represents. The sagittal plane divides the body into left and right halves, the frontal (or coronal) plane divides the body into front (anterior) and back (posterior) portions, and the transverse (or horizontal) plane divides the body into upper (superior) and lower (inferior) halves.
Given this understanding, we can deduce that the sagittal plane is the only one that cannot show: (a) both the brain and tongue, (b) both eyes, (c) both the hypogastric and gluteal regions, (d) both kidneys, (e) both the sternum and vertebral column, and (f) both the heart and uterus. This is because these structures or regions are located on opposite sides of the body (left and right) and not vertically or anterior-posteriorly.
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Which mRNA sequence is the complement to the DNA sequence GATCAC?
1.CUAGUG
2.UAGUGA
3.AGUGAC
4.GUGAUC
Final answer:
The mRNA sequence that is complementary to the DNA sequence GATCAC is CUAGUG, corresponding to option 1 in the multiple-choice question provided. This is determined by pairing each DNA base with its RNA complement following the transcription rules.
Explanation:
The student's question asks which mRNA sequence is the complement to the DNA sequence GATCAC. The transcription process in biology involves creating a complementary RNA strand from a DNA sequence. Each DNA base pairs with a specific RNA base: adenine (A) pairs with uracil (U) in RNA, thymine (T) pairs with adenine (A), cytosine (C) pairs with guanine (G), and guanine (G) pairs with cytosine (C).
Using these pairing rules, we find the complementary RNA sequence for the DNA sequence GATCAC as follows:
DNA: G
mRNA: C
DNA: A
mRNA: U
DNA: T
mRNA: A
DNA: C
mRNA: G
DNA: A
mRNA: U
DNA: C
mRNA: G
Therefore, the correct mRNA sequence that is complementary to GATCAC is CUAGUG, which corresponds to option 1.
Before Alonzo prepares potatoes for dinner, he takes them out of the refrigerator and allows them to sit by a sunny window for about 30 minutes. To prepare them, he peels the potatoes, cuts them into small pieces, and boils them in water. Which of his actions can lead to losses of minerals from the vegetable?
A) Exposing the potatoes to sunlight
B) Cooking the potatoes at high temperatures
C) Storing the potatoes in the refrigerator
D) Using excess water to cook the potatoes
Answer:
D. Using excess water to cook potatoes
Explanation:
Using excess water to cook potatoes can reduce its mineral content.
Answer:
The action that can lead to losses of minerals from the vegetable is D) Using excess water to cook the potatoes.
Explanation:
Due to cooking many losses of minerals for example sodium, potassium, phosphorus, calcium, magnesium, iron, zinc, manganese, copper and various other food materials can be seen.Before and after cooking following changes take place in the mineral content of the vegetables.
(1) The mineral contents of cooked foods in mass cooking were on an average about 60-70 percent of those in raw or uncooked foods.
(2) Cooking losses were particularly high in minerals of vegetables.
(3) Among various cooking methods, loss of mineral was largest in squeezing after boil and in soaking in water after thin slice, followed by parching, frying and stewing.
(4) Cooking losses of minerals in meals cooked in home brought about the similar results as those by the mass cooking procedures.
The measures to prevent cooking loss are
(a) eating the boiled food with the soup
(b) addition of small amount of salt (about 1% NaCl) in boiling
(c) avoidance of too much boiling
(d) selection of a cooking method causing less mineral loss (stewing, frying or parching).
Food chains demonstrate the flow of ______ and materials through ecosystems
Answer:
energy
Explanation:
Which of the following correctly lists the parts of the water cycle?
a Evaporation, condensation, temperature, precipitation, collection
b Condensation, build-up, runoff, precipitation, collection
c Runoff, precipitation, evaporation, melting, condensation
d Evaporation, condensation, precipitation, runoff, collection
Answer:
D
Explanation:
The following sections of the water cycle are correct: Evaporation, condensation, precipitation, runoff, and collection are in Option D as the water cycle is the continuous movement of water in ecosystems.
What are the steps of the water cycle in the ecosystem?The steps of the water cycle consist of evaporation, where water from oceans, lakes, rivers, and even soil is converted into water vapor; condensation, where water vapor rises and cools; and precipitation, where clouds become heavy with water droplets. Then Precipitated waters flow into rivers, and this water can also be collected in man-made structures such as reservoirs and lakes.
Hence, the following sections of the water cycle are correct: Evaporation, condensation, precipitation, runoff, and collection are in Option D as the water cycle is the continuous movement of water in ecosystems.
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Sides of the retina are referred to either as nasal or temporal. Nasal is ______ where temporal is ______ A. closest to the forehead; closest to the chin B. closest to the nose; closest to the temples C. closest to the temples; closest to the nose D. closest to the left; closest to the right Reset Selection
Answer: The correct answer to the question is option B
Closest to the Nose; Closest to the temples.
Sides of the retina are referred to as either as nasal or temporal.
Masai is closest to the NOSE while temporal is closest to the TEMPLES.
Explanation: The retina is the innermost layer of the eye,it is made of nerve fibers that transmit impulses to the visual centre in the brain via the optic nerve and the macula lutea which contains light sensitive cells.
The retina is divided into the Nasal retina and the temporal retina.
The nasal retina is the part of the retina that is nearest to the nose.
It is from this nasal side of the retina that the nerve fibers that are going to the opposite side of the cerebrum are projected after they desiccate in the optic chiasma.( X-shaped structure they is formed as a result of crossing if optic nerves in the brain)(crossing over)
Just like the nasal retina,the temporal retina is the part of the retina that is nearest to the temples and it is from this side of the retina that nerve fibres that are going to the same side if the cerebrum are projected after they pass through the optic chiasma. X-shaped structure they is formed as a result of crossing if optic nerves in the brain)(crossing over)
The nasal side of the retina refers to the part closest to the nose, while the temporal side refers to the part closest to the temples (sides of the head). Thus, the correct answer to the question is option Nasal is closest to the nose; Temporal is closest to the temples'.
Explanation:The terms 'nasal' and 'temporal' when referring to the retina indicate their relative positions within the eye. The nasal side of the retina is the part closer to the nose, whereas the temporal side is closer to the temples, that is, the sides of the head. This can be remembered because the term 'nasal' is related to the nose and 'temporal' is related to the temples. Therefore, in the provided options, the correct choice would be B. 'Nasal is closest to the nose; Temporal is closest to the temples'.
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A mutation takes place in a protein-coding gene that changes one codon resulting in a single amino acid replacement. Which type of replacement is least likely to result in a disruption of protein structure and function?
a) a hydrophobic amino acid to a hydrophilic amino acid
b) a polar amino acid to a hydrophobic amino acid
c) an acidic amino acid to a basic amino acid
d) a hydrophilic amino acid to a hydrophobic amino acid
e) a polar amino acid to a polar amino acid
Answer:
The answer is A
Explanation:
The least likely replacement is a polar amino acid to a polar amino acid ( e )
when a mutation takes place in a protein coding gene that changes a single codon ( replacement of an amino acid ) , the amino acid is either replaced with another amino acid with similar properties or it is replaced with an amino acid with different properties.
when a polar amino acid ( hydrophilic ) is replaced by non-polar amino acid ( hydrophobic ) the protein will loses its function ( i.e. the most effect is experienced ) but when a polar amino acid is replaced by another polar amino acid the protein will retain its function ( i.e. the least effect on the protein structure )
Hence the least likely replacement on the protein structure is the replacement of a polar amino acid to a polar amino acid
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A series of waves with decreasing wavelength labeled A, B, C, D, E, F, G from left to right as wavelength decreases. D is at a place with colored bands crossing the waves with dotted lines down to a colored spectrum from red to blue labeled in nanometers from 700 to 400. Use the drop-down menus to identify the electromagnetic waves. Label A: Label C: Label D: Label G:
Answer:
label A= radio waves, label C= infrared, Label D= visible Light, Label G= gamma rays.
Explanation:
Electromagnetic radiation consists of electromagnetic waves which has frequency of their oscillations. Here label A is radio waves, label C is infrared, Label D is visible Light, Label G is gamma rays.
What are designations of electromagnetic waves?Waves are usually transverse and longitudinal,electromagnetic waves are transverse wave. Electromagnetic spectrum is usually divided into 7 regions, i.e.,
Radio waves.Microwaves.Infrared (IR).Visible light.Ultraviolet (UV) light.X-raysGamma-rays.All these are in order of decreasing wavelength and increasing frequency.
Thus, here label A is radio waves, label C is infrared, Label D is visible Light, Label G is gamma rays.
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Explain how competition limits a population's growth.
Answer: they compete to gather food
Explanation: so therefore the food is in a shortage. So then the weakest/oldest and youngest die out.
5. What is the decay product of Uranium-238?
Answer:
Pb-206
Explanation:
How many sex chromosomes does a human haploid cell contain?
Answer:
2
Explanation:
A human haploid cell has two sex chromosomes, a XX (female) and a XY (male)
Who were the main astronomers that named the constellations?
Answer:
In 150 A.D., the Greek scientist Ptolemy published a book, known by its Arabic name, The Almagest, which contained a summary of Greek astronomical knowledge, including a catalog of 1022 stars, with estimates of their brightness, arranged into 48 constellations.
Explanation:
The ancient Greeks and Romans named the constellations based on mythology and cultural beliefs. Astronomers like Giovanni Riccioli and Johann Bayer also contributed to naming features on the Moon and stars in constellations. The brightest stars have names derived from ancient languages.
Explanation:The main astronomers that named the constellations were the ancient Greeks and Romans. They grouped stars into patterns or constellations and gave them names based on mythology and cultural beliefs. The Greeks named sections of the sky in honor of characters in their mythology and then fit the star configurations to animals and people as best they could. The Romans also named the planets after their chief gods.
Later, astronomers like Giovanni Riccioli and Johann Bayer played a role in naming features on the Moon and stars in constellations. Riccioli named lunar craters after famous astronomers, while Bayer assigned Greek letters to the brightest stars in each constellation.
The brightest stars have names that have been passed down from ancient times, with some derived from Greek, Latin, and Arabic languages. Examples include Sirius, which means "the scorched one," and Vega, which means "swooping Eagle."
Donkeys have a somatic chromosome number of 62. Hybrids produced by crossing donkeys and zebras are called zonkeys, are sterile, and have many characteristics intermediate between the two parental species. If a zonkey has 52 chromosomes, what is the somatic chromosome number of zebras:
Answer:
42
Explanation:
The somatic chromosome of zebras will be 42.
During gamete formation prior to fertilization, reproductive cells divides by meiosis to give rise to haploid cells with half the number of chromosomes of the somatic cells.
During fertilization, two haploid gametes fuse together to give rise to a diploid zygote.
A donkey with 62 somatic chromosome will produce gametes with 31 chromosomes. Zonkey is a diploid organism and has chromosome number of 52, hence, the haploid gamete of zebra would have:
52 - 31 = 21 chromosomes.
Hence, the diploid (somatic) chromosome number of zebras will be:
21 x 2 = 42 chromosomes.
The lateral compartment of the leg contains which muscles?
Peroneus longus, extensor digitorum longus
Abductor hallucis, lumbricals, interossei
Tibialis anterior, extensor hallucis longus,
Peroneus brevis, peroneus longus
Final answer:
The lateral compartment of the leg contains the fibularis longus (peroneus longus) and the fibularis brevis (peroneus brevis), which are responsible for eversion and plantar flexion of the foot and stability of the ankle joint.
Explanation:
The lateral compartment of the leg contains the fibularis longus (peroneus longus) and the fibularis brevis (peroneus brevis). These muscles are responsible for eversion and plantar flexion of the foot, as well as providing stability to the ankle joint.
Assume that 357,250,000 kilocalories are available at the producer level in this Chesapeake Bay ecosystem. Calculate the amount of usable chemical energy available at each level in the pyramid. Show your work.
Answer:
357,250,000 -> 35,725,000 -> 3,572,500 -> 357,250 -> 35,725
Explanation:
only 10% of the energy at one level gets passed to the organism in the next level.
hope this helps :)
At every level in the energy pyramid, 10% of the energy reduces from producers to quaternary consumers.
What is energy pyramid?Energy pyramid is the flow of energy.
What is reduces?Reduces mean decreases.
What are producers?Producers are the plants which can prepare food by themselves.
What are quaternary consumers?Quaternary consumers are the top most predators which consumes tertiary consumers.
So there are five energy levels in a pyramid. they are producers in which the energy is 357,250,000 KC, primary consumers (35,725,000 KC), secondary consumers (3,572,500 KC), tertiary consumers (357,250 KC) and quaternary consumers ( 35,725 KC).
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What is a biomoleclue composed of amino acids connected you peptide bonds
Mango the parrot jumped very quickly toward an empty paper cup. When she hit the cup, it moved into the air and fell off the table. What happened when Mango hit the cup?
A. Energy was transferred from the cup to Mango.
B. Both Mango and the cup gained energy.
C. Both Mango and the cup lost energy.
D. Energy was transferred from Mango to the cup.
Answer:
try D. Energy was transferred from Mango to the cup.
Explanation:
Which of the following statements about bryozoans (ectoprocts) is correct? a. Adult bryozoans are sessile, but their larvae make up much of marine plankton. b. Bryozoans are colonial, build reefs, and are related to corals. c. Bryozoans build reefs and have lophophores that extend through a hard exoskeleton. d. Bryozoans are colonial and live amongst mosses.
Answer:
c. Bryozoans build reefs and have lophophores that extend through a hard exoskeleton.
Explanation:
Bryozoans are sessile and colonial, typically settling on hard substrate including sand grains, rocks, and shells, as well as on blades of kelp or other algae, although some species settle on softer sediment.
The correct statement about bryozoans (ectoprocts) is b. Bryozoans are colonial, build reefs, and are related to corals.
To determine the correct statement, let's analyze each option:
a. Adult bryozoans are sessile, but their larvae make up much of marine plankton.
- This statement is true. Bryozoans, also known as ectoprocts, are primarily marine and freshwater sedentary (sessile) animals. Their larvae are indeed planktonic, meaning they drift in the water column as part of the plankton. However, this statement alone does not fully characterize bryozoans.
b. Bryozoans are colonial, build reefs, and are related to corals.
- This statement is correct. Bryozoans are colonial organisms, meaning they live in groups of interconnected individuals. Some species of bryozoans do contribute to reef formation, although they are not the primary reef-builders in modern oceans (that role is primarily filled by corals). Bryozoans are distantly related to corals as both are members of the phylum Lophotrochozoa, but they belong to different classes
c. Bryozoans build reefs and have lophophores that extend through a hard exoskeleton.
- This statement is partially true. While bryozoans do have lophophores (a crown of tentacles surrounding the mouth, used for filter feeding), these structures do not extend through a hard exoskeleton. The lophophore is typically withdrawn into a protective skeletal structure called a zooecium when not feeding. While some bryozoans contribute to reef structures, they do not build reefs in the same way that corals do.
d. Bryozoans are colonial and live amongst mosses.
- This statement is misleading. While the name ""bryozoan"" means ""moss animal,"" this is a historical misnomer. Bryozoans do not live amongst mosses; they are aquatic animals and the ""moss"" in their name likely refers to their colonial, branching appearance that might superficially resemble moss.
Given the information above, option b is the most accurate statement regarding bryozoans. They are indeed colonial, some species contribute to reef structures, and they are related to corals within the Lophotrochozoa phylum.
Which of the following statements is false ?
A. Spermatozoa can generally be found in the vagina of a living female three days after sexual intercourse.
B. Semen is unequivocally identified by the presence of spermatozoa.
C. Semen will contain the enzyme p30.
D. The likelihood of finding seminal acid phosphatase in vaginal swabs decreases with time.
Answer:
Option A, Spermatozoa can generally be found in the vagina of a living female after three days
Explanation:
The average life of spermatozoa in the female reproductive tract after ejaculation determines the fertility. Sperm survive for a longer period of time after it reaches the cervix. A spermatozoon (motile sperm) survives for nearly 2.5 hours in the vagina and 48 hours in the oviduct.
However, spermatozoa irrespective of its motility or viability can be found after coital ejaculation in the cervix and vagina even after 12 and 9 days respectively.
Hence, option A is the correct choice of answer
How could a food web Based in water be connected to a good web based on land give examples?
Answer:
For an instance, an aquatic food web can be connected to a food web that is based on land. Planktons and algae are some of the main producers which are found in the marine ecosystem. These planktons are eaten by a tiny shrimp called krill. Whales, seals, squids and fishes feed on these tiny shrimps.
Explanation:
Diane wanted to demonstrate which pruning technique was best for controlling the growth of certain types of shrubs. She selected ten shrubs of the same type and randomly assigned each one to receive one of ten different pruning methods. Two weeks after pruning, she measured the regrowth, in inches, of the shrubs; the pruning method that minimized regrowth was recommended as the best method. Which of the following best describes why this is not a well-designed experiment?
A. The shrubs were not randomly selected.
B. Pruning methods were not randomly assigned to shrubs.
C. Each pruning method was used on only one shrub.
D. Each shrub did not receive all ten pruning methods.
E. Only two treatments should be used in an experiment.
Answer:
C. Each pruning method was used on only one shrub.
Explanation:
Reproducibility is one of the most important factors contributing to the reliability of scientific research. The researcher must be able to achieve the same results two to three times. In biological research, this is usually done in the from of triplicates i.e. one experiment is repeated three times. This is done for two reasons:
Producing reproducible resultsRuling out false positives (a negative result that presents as positive due to error) and negatives (a positive result that presents as negative due to error)Triplicates rule out the possibility that the observed change was caused by another factor or through mere chance. Therefore, in the current scenario, each pruning method should have been applied to multiple (at least 3) samples of a shrub.
The ovarian cycle describes the monthly events of a post-pubescent ovary that causes a small number of primary follicles to grow, mature, and ovulate each month. what is the order of the events in one ovarian cycle? drag and drop the events below in the proper sequence.
Answer:
The ovarian cycle regulates endocrine tissue preparation, and egg release in female body.
The first half of the ovarian cycle as the follicular process. Slowly growing rates of FSH and LH are causing follicle development on the ovary surface. This cycle makes the egg primed for ovulation. As the follicles develop they start releasing estrogens and low progesterone levels. Progesterone locks the endometrium in order to help ensure pregnancy. It takes about seven days to travel ovum through the Fallopian tube and to get implanted in uterus. There are 30-60 cells at this point of evolution, called the morula. If there is no pregnancy implantation the lining would be sloughed off. estrogen levels increase after around 5 days, and the menstrual cycle enters the proliferative process. The endometrium starts to regrow, replacing the weakening blood vessels and glands at the end of the last cycle.