What is an allergic reaction ?
Answers
Answer:
Allergies are your body’s reaction to a substance it views as a harmful
Explanation:
“invader.” For example, coming into contact with what is normally a harmless substance, such as pollen, might cause your immune system (your body’s defense system) to react. Substances that cause these reactions are called allergens.
Related Questions
Darwin's theory of evolution did NOT contain the concept that
O favorable traits are passed from one generation to the next.
O resources are unlimited in environments.
genetic variations are produced by mutations and sexual recombination.
organisms that are best adapted to their environment survive
Answers
Answer:
favorable traits are passed from one generation to another
Explanation:
gftyfngfwfqwfrr3r23
how does Genetic diversity happen
Answers
Answer:
Genetic diversity occurs when mutations create new alleles over time.
Explanation:
Answer:
Genetic diversity happens when mutations create new alleles over a period of time.
What is genetic diversity?
Genetic diversity in a very simple term is the natural variation that exists within the individuals of an species.
The first rule of Darwin's theory says, there is a natural variation. Leaving apart identical twin cases, no 2 individuals of the population are exactly similar, no matter how close they are. There are two factors that are responsible for this variation :
Phenotypic factors: the external factors like food, climate, the way of nurturing etc. These variations are not inheritable.Genotypic factors: these characters are gene governed and are inheritable.The variations because of (2) are called “genetic diversity” of a particular species. The rich genetic diversity is of immense use to us and also to nature. Development of improved plants or race improvisation of domestic animals is possible through this.
We are fast narrowing down the global natural genetic diversity of animals and plants by our un mindful modernization activities. The loss is great and unrepairable.
PLEASE answer all these questions if you can. 1 attempt for all
1.) Which of the following is true about prophase?
chromatin changes into chromosome form
all of the choice occur during prophase
chromosomes line up at the equator of the cell
cytokinesis occurs
2.) Which of the following is true about metaphase?
chromatin changes into chromosome form
chromosomes line up at the equator of the cell
all of the choice occur during metaphase
nucleolus disappears
3.) Which of the following describes the products of mitosis?
one cell identical to the parent
cell death
two unique cells
two daughter cells that have identical DNA to the parent
4.) What is the role of the spindle during cell division?
to separate the chromosomes
to break down the nuclear membrane
to divide the cell in half
to duplicate the DNA
5.) In what phase of mitosis are chromosomes first visible?
Interphase
Prophase
Telophase
Metaphase
6.) A centromere
holds two sister chromatids together
is an unduplicated chromosome
is half of a duplicated chromosome
forms the spindle fibers
7.) In which phase of meiosis would you see crossing over occur?
Anaphase I
Prophase I
Anaphase II
Prophase II
8.) Oogenesis produces __ viable cell/s, and spermatogenesis produces __ viable cell/s.
4, 2
4, 1
4, 4
1, 4
9) Haploid gametes produced in males are called sperm.
True
10.) Which of the following best describes a tetrad?
the spindle fibers at the end of telophase I
the four cells resulting from meiosis
homologous chromosomes during prophase I
tetrads are not present in meiosis, they are present mitosis
False
Answers
Answer:
1. a
2. b
3. d
4. a
5. b
6. d
7.b
8. im not sure abt this one, sry :(
9. yeah, true
10. c
Explanation:
Pro phase is the starting stage of the division where the cell division begins. Spindle fibers are broken into half and the type of division that is present in gametes is reduction division that is the meiosis. Synapsis occurs during mitosis.
What is synapsis ?It is defined as the stage in which the pairing of the homologous chromosomes take place.
Chromosomes do not line at the equator as the lining of the chromosomes at the equator occurs on the stage of mitosis where it is possible to see the V,J and L shapes of the paired chromosomes. After this stage the exchange of genetic material takes place.Chromatin do not change into chromosomes in the metaphase.
Mitosis is present only to make the duplicate copies of the cell. The identical daughter cells are made when the division of mitosis is taking place in the cell. Chromosomes are first visible in the prophase. A centromere holds two sister chromatids together.
In meiosis crossing over takes place in anaphase 1.
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Help with biology plzz USA test prep
Answers
Answer:
see below
Explanation:
amplification: MUTATION = a type of mutation
independent assortment: MENDELIAN = how different
genes independently separate from one another
when reproductive cells develop
nondisjunction: MUTATION = a type of chromosomal
mutation
translocation: MUTATION = another type of chromosomal
mutation
codominance: MENDELIAN = a relationship between two
genes where neither allele is recessive and both
are expressed
insertion: MUTATION = a type of mutation
radiation: MUTATION = causes mutations
virus: MUTATION = causes mutations as the virus
replicates
deletion: MUTATION = a type of mutation
law of dominance: MENDELIAN = one of Mendel's laws
of inheritance
sex linked traits: MENDELIAN = linkage is an exception
to Mendel's law of independent assortment
incomplete dominance: MENDELIAN = when none of the
factors of a gene is dominant and there is a blend,
such as a red flower crossed with a white flower
turns out pink
law of segregation: MENDELIAN = one of Mendel's laws
of inheritance
substitution: MUTATION = a type of mutation
Suppose we had a genetic experiment where we hypothesize the 9:3:3:1 ratio of characteristics A, B, C, D. The hypotheses to be tested are H0: p1 = 9/16, p2 = 3/16, p3 =3/16, p4 =1/16, H1: at least two proportions differ from those specified. A sample of 160 offspring are observed and the actual frequencies are 82, 35, 29, and 14, respectively.
Answers
To test the hypotheses regarding the observed frequencies of characteristics A, B, C, and D, we can use a chi-squared goodness-of-fit test. This test will help determine whether the observed frequencies significantly deviate from the expected frequencies based on the hypothesized ratios.
Let's proceed with the hypothesis test:
Step 1: Define the hypotheses:
H0: p1 = 9/16, p2 = 3/16, p3 = 3/16, p4 = 1/16 (the observed frequencies follow the expected 9:3:3:1 ratio)
H1: At least two proportions differ from those specified.
Step 2: Set the significance level (α):
The significance level, denoted as α, determines the threshold for deciding whether to reject the null hypothesis. Let's assume a significance level of α = 0.05, which is a common choice.
Step 3: Calculate the expected frequencies:
Based on the hypothesized ratios, we can calculate the expected frequencies for each characteristic. Since the sample size is 160, we multiply each proportion by 160 to obtain the expected frequencies:
Expected frequency for A: (9/16) * 160 = 90
Expected frequency for B: (3/16) * 160 = 30
Expected frequency for C: (3/16) * 160 = 30
Expected frequency for D: (1/16) * 160 = 10
Step 4: Perform the chi-squared test:
We can now calculate the chi-squared statistic using the formula:
χ² = Σ((O - E)² / E)
where Σ represents the sum over all categories, O is the observed frequency, and E is the expected frequency.
For our example:
Observed frequencies: O(A) = 82, O(B) = 35, O(C) = 29, O(D) = 14
Expected frequencies: E(A) = 90, E(B) = 30, E(C) = 30, E(D) = 10
Calculating the chi-squared statistic:
χ² = ((82-90)² / 90) + ((35-30)² / 30) + ((29-30)² / 30) + ((14-10)² / 10)
Step 5: Determine the critical value:
The critical value is obtained from the chi-squared distribution table or using statistical software. The degrees of freedom for this test are equal to the number of categories minus 1. In our case, there are 4 categories, so the degrees of freedom (df) = 4 - 1 = 3.
With α = 0.05 and df = 3, the critical value is approximately 7.815.
Step 6: Make a decision:
Compare the calculated chi-squared statistic to the critical value. If the calculated value is greater than the critical value, we reject the null hypothesis (H0). Otherwise, we fail to reject H0.
If the calculated chi-squared statistic is less than or equal to the critical value, we fail to reject the null hypothesis (H0), which means the observed frequencies do not significantly deviate from the expected frequencies based on the hypothesized ratios.
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In which of the following places will the soil contain plenty of water and nutrients?Why?a) Desertb) Forestc) Beach
Answers
Answer:
forest and beach
Explanation: because water absorbed by forest soil is protected from the sun and less likely to evaporate, and water absorbed by beach soil is exposed to the sun and evaporation but unlike desert soil, water levels in beach soil are being consistently replenished.
how would malonate inhibition affect electron flow in the electron transport chain? how would this alter the citrate cycle and atp synthesis?
Answers
Malonate is a competitive inhibitor of succinate dehydrogenase, which is an enzyme involved in the citric acid cycle and the electron transport chain.
As succinate dehydrogenase is inhibited by malonate, the flow of electrons from succinate to ubiquinone in the electron transport chain would be blocked.
This would result in a decrease in the electron transport chain's ability to generate a proton gradient across the inner mitochondrial membrane, leading to a decrease in ATP synthesis.
Additionally, as the citrate cycle is linked to the electron transport chain, the inhibition of succinate dehydrogenase by malonate would result in the accumulation of succinate in the mitochondria. This accumulation would lead to a reduction in the availability of oxaloacetate, which is a critical molecule in the citrate cycle. As a result, the citrate cycle would slow down, leading to a reduction in the production of ATP through oxidative phosphorylation.
In summary, malonate inhibition of succinate dehydrogenase would lead to a decrease in electron flow in the electron transport chain, a decrease in the production of a proton gradient, a decrease in ATP synthesis, and a reduction in the rate of the citrate cycle.
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in which country is the population likely increasing most rapidly?
answers:
Australia
Germany
Kenya
France
Answers
Answer:
Kenya
Explanation:
The _____ is the outer layer of the kidney, located just deep to the fibrous capsule.
renal sinus
renal cortex
renal medulla
renal lobe
Answers
The renal cortex is the outer layer of the kidney that lies just deep into the fibrous capsule. The renal cortex is a highly vascularized region that contains numerous nephrons, which are the functional units of the kidney responsible for filtering blood and producing urine.
The fibrous capsule is a dense layer of connective tissue that surrounds and protects the kidney from damage. It is located just outside of the renal cortex and provides support for the kidney's internal structures. The renal sinus is the innermost part of the kidney that contains the renal pelvis, calyces, and renal blood vessels. The renal medulla is the innermost part of the kidney that contains the nephrons and renal pyramids. A renal lobe is a functional unit of the kidney that consists of a renal pyramid and its overlying cortex. Each kidney contains multiple renal lobes that work together to filter blood and produce urine.
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What is the name of Earth’s innermost layer?
Answers
Answer:
Earth core or inner core
Explanation:
consider the total breakdown of the glycogen structure below. assuming each glycosidic linkage can be broken down completely and the resulting products are fed through glycolytic metabolism.
Answers
The complete breakdown of glycogen structure results in the production of glucose molecules.
Glycogen is a complex carbohydrate composed of many glucose units linked together by glycosidic bonds. During the breakdown of glycogen, each glycosidic bond is cleaved by the action of glycogen phosphorylase, releasing a single glucose molecule.
The breakdown of glycogen occurs through the action of the enzyme glycogen phosphorylase, which cleaves the glycosidic bonds and releases individual glucose molecules. These glucose molecules can then be used as a source of energy for the body through cellular respiration.
Once the glucose molecules are produced, they can be fed into the glycolytic metabolism pathway, which results in the breakdown of glucose into pyruvate. This process generates energy in the form of ATP and is an important source of energy for the body, particularly during intense physical activity.
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Can plants survive without osmosis?
Answers
Answer:
no.
Explanation:
Osmosis is the movement of solvent molecules across a semi-permeable membrane due to solute concentrations on either side of that membrane. In order for plants to remain healthy and thrive, osmosis is a necessary process.
Use the drop-down menu to complete the statement.
Consider a star with a surface temperature of 6000 K.
Use the information presented on the graph to
complete the statement.
The star emits most of its energy in the v
range.
UV
visible light
infrared
Answers
Answer:
B: visible light
Explanation:
Answer:
B
Explanation:
NEED ANSWER
WILL GIVE BRAIINLIEST
Tay Sachs disease is an autosomal recessive disorder involving the hexoaminidase gene. What type of mutation occurs in this gene?
Answers
Tay-Sachs disease is caused by mutations in the HEXA gene and inheritance is autosomal recessive . The HEXA gene gives the body instructions to make part of the beta-hexosaminidase A enzyme, which is needed to break down a substance called GM2 ganglioside.
i hope this helped! please mark me as brainliest and 5 stars >:)
Answer:
Frameshift mutation
Explanation:
A frameshift mutation is a genetic mutation caused by insertions or deletions that shift the whole sequence.
In the following reaction what is the oxidation number of each species? CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l)
Answers
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l)
The oxidation numbers of each species in the given reaction are as follows:
CH4(g): -4
O2(g): 0
CO2(g): +4
H2O(l): -2
What are the oxidation numbers in the reaction?In the given reaction, the oxidation numbers of each species can be determined by assigning electrons to the atoms based on electronegativity and the sharing or transfer of electrons.
In methane (CH4), carbon has an oxidation number of -4 since hydrogen is more electronegative. Oxygen gas (O2) has an oxidation number of 0 since it is a diatomic molecule and does not have a charge.
In carbon dioxide (CO2), carbon has an oxidation number of +4 since it is bonded to two oxygen atoms, each with an oxidation number of -2. Lastly, in water (H2O), hydrogen has an oxidation number of +1 while oxygen has an oxidation number of -2.
Therefore, the oxidation numbers for the species in the reaction are CH4(g): -4, O2(g): 0, CO2(g): +4, and H2O(l): -2.
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Mitosis is a type of cell division. organize the images below to show the steps of mitosis.
Answers
Answer:
The correct order is F, E, C, G, H, A, D, and B (look at the image in the attached files)
Explanation:
Interphase: Stages G1, S, and G2. At this point probably, the chromatin duplication has already occurred, but it is still lax or dispersed. It has not condensed yet. Two pairs of centrioles are outside the nucleus (FIGURE F) Prophase: Centrioles move forward to the opposite poles of the cell. Chromatin is condensed and individual chromosomes are now visible. The nuclear membrane breaks into many pieces. Spindle apparatus -microtubules- forms. (FIGURE E)Metaphase: The polar and the kinetochore fibers drive each individual chromosome to the equatorial plane. This stage ends when all the chromosomes are completely arranged in the medial area. (FIGURE C)Anaphase: Sister chromatids separate and move to the opposite poles of the cells, driven by the microtubules. In each pole, there are a pair of centrioles (FIGURE G and H). Telophase: The nuclear membrane rearranges. Each sister chromatid becomes now a new chromosome. There is a pair of centrioles outside each of the nuclei. (FIGURE A)Cytokinesis occurs at the end of the cell division. The rest of the cell is divided into two new daughter cells. Each daughter cell is an identical copy of the other cell, with the exact same genetic material (FIGURE D). Decondensation of the genetic material of each new cell (FIGURE B).
Answer:
follow the attachment and you will get all right just pay attention which one is which
Explanation:
Summary of human nutrition
Answers
Answer:
Human nutrition is the process of which substances are Transformed into tissues and energy which are used up to mental and physical activities!
"If global warming sometimes seems like a distant or abstract threat, new research casts the phenomenon in stark, life-or-death terms. It predicts that in the absence of significant progress in efforts to curb emissions of temperature-raising greenhouse gases, extreme heat waves could claim thousands of lives in major U.S. cities. If the global average temperature rises 3 degrees Celsius (5.4 degrees Fahrenheit) above preindustrial levels — which some scientists say is likely if nations honor only their current commitments for curbing emissions — a major heat wave could kill almost 6,000 people in New York City. Similar events could kill more than 2,500 in Los Angeles and more than 2,300 in Miami. But the new research also indicates that if the U.S. and other nations take aggressive steps to limit warming, many of those deaths from extreme heat might be avoided. "There is, actually, still hope, and a very small window of opportunity" to keep global warming below international targets and prevent some heat-related deaths, said Eunice Lo, a climate scientist at the University of Bristol in the United Kingdom." This article was published in 2019. Have things improved since then? This past summer, nearly 100 people died from heat-related issues in Vancouver B.C. and many others is Los Angeles and Florida. Comment on what action governments need to take to deal with this global emergency that impacts Canada as well.
Answers
The phenomenon of global warming has been casting a stark life or death shadow over many major U.S. cities. The increase in temperature due to the emission of greenhouse gases may cause an extreme heat wave that could claim thousands of lives in these cities.
Even if nations honor only their current commitments for curbing emissions, the global average temperature is expected to rise by 3 degrees Celsius, which some scientists say is likely.
A major heat wave in New York City could claim up to 6,000 lives, while similar events in Los Angeles and Miami could kill over 2,500 and 2,300 people, respectively, according to the new research.
However, if the U.S. and other nations take aggressive measures to limit warming, many heat-related fatalities could be prevented.
The article was published in 2019, but there is little evidence to suggest that the situation has improved significantly. Heat-related issues have claimed several lives in Vancouver, B.C. and many others in Los Angeles and Florida this past summer.
Governments should take several steps to deal with this global emergency that impacts Canada, including the following:
Take action to reduce greenhouse gas emissions: Governments must commit to reducing greenhouse gas emissions to reduce the impact of global warming. Carbon taxes, cap-and-trade systems, and other measures can be used to discourage the use of fossil fuels in favor of cleaner, more sustainable energy sources, such as solar and wind power.Adaptation measures: Governments must also take steps to prepare for the effects of global warming that are already occurring or are expected to occur in the future. This includes developing heatwave response plans, implementing urban heat island mitigation measures, and providing cooling centers for people at risk of heat-related illness or death.Public education: Governments should educate the public about the risks of heat-related illness and how to avoid it. Information about the best ways to stay cool, hydrated, and safe during a heat wave should be widely distributed, particularly to vulnerable populations, such as the elderly, children, and those with chronic health conditions.Learn more about global warming at
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hellppppppppppppppppp
Answers
60/5 = 12 (breaths per minute)
The leaves of the coriander plant are better known as what in the u. S. ?.
Answers
The leaves of the coriander plant are better known as cilantro in the U.S.
Cilantro is a commonly used herb in many different types of cuisine.
It is often used as a garnish or ingredient in Mexican, Thai, and Indian dishes, among others.
The coriander plant is a versatile herb that is used in many different parts of the world. In the U.S., however, the leaves of the coriander plant are better known as cilantro. This herb is commonly used in Mexican cuisine, where it is often added to salsa, guacamole, and other dishes for its fresh, citrusy flavor. It is also a popular ingredient in Thai and Indian cuisine, where it is used to add depth and complexity to curries and other dishes.
Cilantro is a very fragrant herb, and its leaves have a distinctive aroma and flavor. Some people love cilantro, while others find it overpowering or unpleasant. This may be due to genetic differences that affect how individuals perceive the herb.
Despite its polarizing flavor, cilantro is a valuable ingredient in many different types of cuisine. It is also a good source of vitamins and minerals, including vitamin C, vitamin K, and potassium. If you're not a fan of cilantro, there are many other herbs that can be used in its place, such as parsley, mint, or basil.
The leaves of the coriander plant are known as cilantro in the U.S., and this fragrant herb is a common ingredient in many different types of cuisine. Whether you love it or hate it, there's no denying that cilantro adds a unique flavor and aroma to dishes that is hard to replicate with other herbs.
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Which graph best represents directional selection? Graph A has trait value on the horizontal axis and population of individuals on the vertical axis. The original population increases, decreases, increases, and then decreases again. The population after selection increases at the point that the original population drops. Graph A Graph B has trait value on the horizontal axis and population of individuals on the vertical axis. The original population and population after selection have similar curves, but the original population peaks before the population after selection. Graph B Graph C has trait value on the horizontal axis and population of individuals on the vertical axis. The original population peaks at the same time as the population after selection but the original population peaks higher and at a more rapid speed. Graph C
Answers
In populations in which directional selection has acted, most individuals express one of the extreme phenotypes. In the exposed example, graph B represents directional selection.
What is directional selection?
Directional selection is one of the three types of natural selection, together with disruptive selection and balancing selection.
Directional selection increases in the proportion of individuals with an extreme phenotypic trait.
There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.
This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
According to the description of the three graphs, graph B is the one that represents directional selection.
The original population shows a greater proportion of individuals expressing the intermediate phenotype.After selection, most individuals in the population express one of the extreme phenotypes (the one at the right).You can learn more about directional selection at
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Answer:
Graph B is correct
Explanation:
trust
Compare non-point source pollution to point source pollution
Answers
Answer:
Point-source pollution is easy to identify. As the name suggests, it comes from a single place. Nonpoint-source pollution is harder to identify and harder to address.
A defensive soccer player is having trouble reacting quickly to the movements of the opposing player. How can the soccer player adjust her base of support to improve her reaction time?
Answers
Answer:
decrease the base of support and centralize her line of gravity
Explanation:
A wider base of support leads to an unsteady gait. The base of support is the contact between the feet of the soccer player and the surface (the field) supporting him. The root cause of the player's inability to react quickly to the movements of the opposing player is a lack of balance.
Balance is the ability of an individual to sustain the line of gravity which runs the center of gravity. For the player to regain his balance, she needs to decrease the base of support and centralize her line of gravity, so as to maintain balance.
Which of the following pairs of characteristics would be best to begin using when creating a dichotomous key for a fish, a lion, a wolf and frog?
1a. has eyes
b. has no eyes
1a. has a mouth
b. has no mouth
1a. has nostrils
b. has no nostrils
1a. has fur
b. has no fur
Answers
Answer:
the answer would be
1a. has fur
b. has no fur
Explanation:
I took the test and got it correct
PLEASE HELP ME PLEASE
Explain the transfer of energy starting with the sun and ending with the decomposers
Answers
Answer:
sun to plants, plants to animals, animals to waste I believe
describe the role of the liver in the assimilation of amino acids by converting them to proteins.
Answers
Explanation:
The liver is important in assimilation. For example, it converts glucose into glycogen (a complex carbohydrate used for storage) and amino acids into proteins. ... This is the removal of the nitrogen-containing part of amino acids, to form urea, followed by the release of energy from the remainder of the amino acid.
The deamination process involves the liver. This involves the release of energy from the remaining amino acid after the nitrogen-containing portion of the amino acid is removed to generate urea.
What is assimilation of amino acids in liver?Assimilation is the transport of molecules from digested food into the body's cells, where they are utilized and eventually become a part of the cells.
Extra glucose in the blood that reaches the liver is either broken down through respiration to produce energy for other uses or turned into glycogen (animal starch) for storage.
The complex proteins and carbs are broken down into glucose and amino acids during absorption. As a result, glucose is used in respiration while amino acids are obtained for the creation of new proteins.
Therefore, the role of the liver in the assimilation of amino acids by converting them to proteins.
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In general, all croplands tend to reduce the diversity and number of pollinator species. In which areas do croplands lead to the greatest % decline in pollinator species?
1. Near urban areas
2. Near pasture
3. In tropical areas
4. In temperate areas
5. In mountainous areas
Answers
It is possible that near urban areas the diversity and number of pollinator species gets reduced. The correct option is 1.
What are pollinators?A pollinator is something that assists in the transport of pollen from either the male part of the flower (stamen) to the female part of a similar or another flower (stigma).
Pollen movement is required for the plant to become fertilized and generate fruits, seeds, and young plants.
Loss of habitat is one of the most serious threats to pollinators.
Expanding urbanization and agricultural development consume these creatures' habitat and replace it with roadways, vast swaths of lawn, and exotic garden plants.
Thus, the correct option is 1.
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Which of the following describes a relationship in which one organism depends on another for its needs?A rabbit burrowing in the groundA hawk catching and eating a mouseA frog cooling off in a pondAn oak tree absorbing sunlight for food
Answers
Answer:
A hawk catching and eating a mouse best describes a relationship in which one organism depends on another for its needs.
PET imaging during an experiment studying the effect of attending to specific features of a visual stimulus showed the greatest brain activity for moving stimuli occurred in which area of cortex? Choose the correct option.
a. IT
b. MT
c. V4
d. Area 17
Answers
The greatest brain activity for moving stimuli was observed in area MT of the cortex.
Area MT, also known as the middle temporal area or V5, is a region of the cortex that is primarily involved in processing motion information. PET imaging during an experiment studying the effect of attending to specific features of a visual stimulus revealed that the greatest brain activity for moving stimuli occurred in this area.
Area MT is located in the posterior part of the middle temporal gyrus in the visual cortex. It receives input from the primary visual cortex (area 17) and processes information related to the perception of motion, direction, and speed of visual stimuli.
The specialized function of area MT in processing motion information makes it particularly active when subjects are attending to moving stimuli. PET imaging, which measures brain activity by detecting changes in blood flow or metabolism, can reveal regions of increased neural activity in response to specific tasks or stimuli.
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importance of platyhelminthesis
Answers
Answer:
The phylum platyhelminthes includes the organism like flatworms, earth worm and many other species. They play a major role in the marine, terrestrial and freshwater ecosystem. It contains a variety of nutrient sources.
Explanation:
They are of great importance from the times when there were no other organism.