Each histone core complex contains a single tetramer made up of the H3 and H4 proteins.
Describe the tetramer structure.Tetramer: A compound made up of four smaller components that are either identical or fairly similar. Covalent or noncovalent forces can be used to link the units together. This tetrapeptide is made up of four similar amino acid residues and is a tetramer called Gly-Gly-Gly-Gly (each is a glycine).
What protein forms tetramers?A tetrameric protein called hemoglobin binds and moves four oxygen molecules at a time before releasing them to myoglobin. Every oxygen molecule that binds to hemoglobin helps the molecule that binds after it, which is known as allosteric cooperative binding.
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How would the environment change if there were fewer plants to carry out photosynthesis?.
If the number of plants that carry out photosynthesis is less, then we would have more carbon dioxide in the atmosphere and lesser oxygen than what it is at present. This is because the recycling of carbon dioxide will be less.
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants. After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. Thus, fewer plants would mean less oxygen, ATP, and glucose and more carbon dioxide.
Photosynthesis provides the carbon needed for organic molecules. Through the process of carbon fixation, photosynthesis takes carbon from Carbon dioxide and converts it into sugars (which are organic).
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which of the following provides the best distinction between the interests involved in cases of genocide and cases of revolution?
In the case of a revolution, society is under pressure and injustice, so for the common good interest to make large-scale changes to social life.
In the case of genocide, it is the intentional killing of a race or nation, for political gain.
Genocide is a form of mass killing, because the killing of a nation or race is done intentionally for political purposes, such as wanting to control natural resources or gain power without caring about innocent people. Meanwhile, a revolution occurs because of injustice or pressure from one particular party, so that people who are suffering try to make massive changes for the sake of the common interest.
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which of the following characteristics are true about bony fish? (select all that apply.)
a. All bony fish possess gills.
b. Bony fish can hover in the water and swim backward.
c. Most bony fish possess a swim bladder to maintain buoyancy.
All these characteristics are true about bony fish, such as their ability to hover in the water and swim backward. They possess gills and a swim bladder to maintain buoyancy. So all three options, a, b, and c, are correct for the statement.
What is the adaptation of a bony fish?The bony fish have a skeleton made up of bones, so the larger bony fish who live in the ocean have an air bladder. This air bladder keeps them buoyant and prevents them from sinking. Fish have gills for breathing as they take in oxygen and release carbon dioxide. Some fish can hover and swim backward.
Hence, all the options, such as a, b, and c, are correct regarding bony fish.
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one of the reasons that viruses are such effective infectious organisms is their ability to gain entry into host cells. which component of a virus is primarily responsible for this feat?
Viral envelope is the component of a virus is primarily responsible for causing infection.
The topmost coat of many different types of viruses is called a viral envelope. When moving between host cells during their life cycle, it safeguards the genetic material. Not every virus has an envelope. Even though some viral glycoproteins are present, the envelopes are typically made from remnants of the host cell membranes. This envelope is produced by a process known as "budding off" from the infected cell, or host. Newly formed virus particles are "enveloped" or wrapped in an outer layer made of a small fragment of the cell's plasma membrane during the budding process.
A small membrane protein known as the virus envelope protein is a minor part of the virus particles. It is crucial for virion assembly and morphogenesis, altering host cell membrane permeability, and virus-host interactions.
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PLEASE HURRY QUICK!!!!!!!!!
Radiation -
- Heat from a fire warming hands
- Cooking popcorn using a microwave
Conduction -
- Grabbing a warm coffee mug to warm hands
- Putting an ice pack over an injury
Convection -
- An oven that cooks by cycling warm air through the bottom and out the top
- Warm water rising to the surface of the ocean and cooler water sinking
Hope that helps lol.
Part 1 Questions
1. You have a battery and a light bulb. What else must you have to complete the circuit to light the bulb. Why is this component necessary?
2. How is a parallel circuit different from a series circuit? Provide an example to support your statement.
3. What is the role of resistance in an electrical circuit? Provide an example to support your statement.
4. Ohm’s law is represented by the following equation
I= V/R
Explain how the current would change if the amount of voltage increased, but resistance stayed the same.
1) A switch is required
2) The series circuit has end to end connection while we connect a parallel circuit to a common junction
3) The resistance would reduce the current in the circuit.
4) The current would increase.
What is a circuit?The term circuit has to do with a path that have been provided for the flow of current. There are the components that must be present so as to be able to make up a circuit. All of these components have various roles and they help the circuit to be able to function well.
1) Since we have the battery and the light bulb, we need a switch and the switch would complete the circuit because it is going to help us to open and close the circuit.
2) In a parallel circuit, the connection is done to a common junction while in a series circuit the connection is done end to end.
3) The resistance is the opposition that is offered to the flow of current in a cicuit. It serves to decrease the flow of current in the circuit.
4) If the voltage is increased and the resistance remains the same then the current would be increased in the circuit.
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when the pathway shown here is activated, the cellular response is gene transcription. what will happen to gene transcription if the signaling molecule (ligand) is absent, but the ras protein is always bound to gtp and why?
Because Ras-GTP is the active version of the signal transduction protein for cell division, cell division would increase.
What is mean by cell division?The process by which a parent cell divides into two daughter cells is known as cell division. Cell growth and chromosome replication precede cell division, which often happens as part of a longer cell cycle.
The process of making new cells for the body, known as mitosis, is usually meant when the term "cell division" is used. Meiosis, a cell division process, is what creates egg and sperm cells.
New cells are created as cells divide. One cell divides into two, which divide into four more cells, and so on. Because new cells are created as old cells divide, we refer to these processes as "cell division" and "cell reproduction."
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Dha and epa, eicosanoids derived from omega-3 fatty acids, reduce blood clot formation and promote heart health. The richest food source of dha and epa is ____________.
Dha and epa, eicosanoids derived from omega-3 fatty acids, reduce blood clot formation and promote heart health. The richest food source of dha and epa is fatty fish.
What are the benefits of EPA and DHA?EPA and DHA have a large number of benefits for our body, the main source of these acids is in fatty fishes such as tuna, anchovies, or salmon. There has an indirect source of EPA in flaxseed oil, leafy vegetables, and nuts. They do not have EPA, they have ALA, which the body converts into EPA, but only really small quantities can be converted.
Fish and seafood or the marine sources are the highest food source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Among the marine sources, fish such as salmon, herring, mackerel and anchovy have the highest content of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).
Therefore, The richest food source of dha and epa is fatty fish.
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Which organelle is responsible for packaging proteins for transport outside the cell?.
Proteins are packaged by the Golgi apparatus for transportation outside of the cell.
What is the structure of cells?The outer layer, the nucleus, and the cytoplasm are the three components that make up a cell. Intricate arrangements of microscopic fibers and thousands and thousands of tiny, unique structures known as organelles can be found in the cytoplasm.
Which cell is the smallest?The pathogenic bacteria Mycoplasma gallicepticum is thought to be the tiniest known organism capable has autonomous reproduction. It lives in the respiratory, genital, and urine systems of primates. Mycoplasma is the name of the cell type that was used in the experiment. It has a 0.0001 mm diameter.
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Which of these are steps in the binary fission process for single cells?
Select all that apply.
A) A new cell wall forms in the center of the cell, splitting it in two.
B) The chromosomes copy themselves and move to opposite sides of the cell.
C) The cell membrane pinches in the middle.
D) The plasmids divide and move so that each new cell gets the same number.
the Art OF beautiful handwriting
Answer:
what is the question?
cause i am not sure what you are asking
macrophages arise from which of the following? macrophages arise from which of the following? monocytes eosinophils neutrophils lymphocytes basophils
Macrophages arise from monocytes. Therefore, the first option (monocytes) is the correct answer.
Monocytes are a type of white blood cell that carry out phagocytosis and destroy antigens. They are the largest white blood cells and are involved in innate immunity.
This type of immune cell circulates through the blood for 1–3 days and then migrates to the tissue. In the tissue, they differentiate into dendritic cells and macrophages.
These macrophages help detect and degrade dead cells, tumor cells, and foreign materials. Macrophages are large phagocytic cells. But they are smaller compared to monocytes. They are specialized cells, so they don't differentiate.
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In contrast to positive ssRNA viruses such as coronaviruses and polioviruses, the genome of retroviruses
A) lacks genes encoding for tRNA primers.
B) must first integrate into the host's genome before transcription.
C) is negative ssRNA.
D) lacks ribonuclease activity
In contrast to positive ssRNA viruses such as coronaviruses and polioviruses, the genome of retroviruses must first integrate into the host's genome before transcription.
What do you mean by single-stranded RNA?Over one-third of all known virus genera are positive-sense RNA viruses. This covers numerous viruses on official lists of possible bioterrorism agents as well as significant infections. In all phases of viral infection, including entry and replication, these viruses employ host factors. Perhaps more significantly, +ssRNA viruses can co-opt host components to modify the host's defenses and gene expression.
A +ssRNA virus' genomic RNA, which is also a messenger RNA, only contains the genes required for the infectious cycle. Its packing is thought to be an adaptation to tolerate mutations and depends on a number of different segments.
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According to the pressure-flow hypothesis, what mechanism causes the movement of phloem sap from sources to sink tissues?.
The mechanism causes the movement of phloem sap from sources to sink tissues that would be differences in the source-sink pressure potential according to the pressure-flow hypothesis.
As a result of the high turgor pressure, phloem sap is transported by "bulk flow" from the source to the sink, where the sugars are quickly eliminated from the phloem. The rise when the sugar is removed, causes the water to leave the phloem and return to the xylem, lowering the p.
Phloem sap moves through phloem via translocation, the transport of dissolved materials in a plant, which is triggered by high turgor pressure and occurs from source to sink. Phloem carries sap both upward and downward, from sugar sources to sugar sinks, unlike the xylem, which can only carry water upward. It is suggested that the phloem is a conduit through which pressure-containing water-carrying food molecules flow.
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the dark, circular is where ribosome assembly begins. 2. the thread-like chromosomes are spread throughout the nucleus in the form of . 3. the membrane of the nucleus is dotted with to allow material in and out.
1) The dark, circular Nucleolus is where ribosome assembly begins.
2) The thread-like chromosomes are spread throughout the nucleus in the form of chromatin.
3) The membrane of the nucleus is dotted with nuclear pores to allow material in and out.
Describe cell organelles.Like an organ in the body, an organelle is a subcellular structure that performs one or more particular functions for the cell. Some of the more important cell organelles are the nucleus, which contains genetic material, the mitochondria, which provide chemical energy, and the ribosomes, which assemble proteins.
As a result, the lysosome breaks down large molecules to create small molecules, whereas the mitochondrion breaks down large molecules to produce energy. Since the mitochondrion depends on all of its pathways, proteins, and enzymes to convert one chemical to another, they must be divided since the lysosome needs an acidic pH.
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drag the description of each dna sample to the appropriate location to identify the expected appearance of the dna band(s) after density-gradient centrifugation.
The only double helices in DNA that is composed of both 14N and 15N strands are 14N/15N
What is DNA sample?Blood, buccal swabs, hair, teeth, fingernails, tissues from internal organs (including the brain), muscle, and skin can all be taken as samples from unidentified bodies. Oral buccal swabs are the most widely used and trustworthy form of sample collection for DNA testing. In addition to being used as evidence in court, it is also utilized to locate biological relatives, identify bodies, and find disease remedies.
DNA Evidence Types and Analysis:
Short Tandem Repeats (STR), Y-Chromosome, and Polymerase Chain Reaction (PCR).Cell mitochondrial DNA
Different bands are formed as a result of the different densities of the double helices of the elements 14N/14N, 14N/15N, and 15N/15N. The bands 14N/14N at the top, 14N/15N in the middle, and 15N/15N at the bottom all have a similar shape.
There are only 15N/15N double helices in DNA from cells grown in 15N.
There are only 14N/14N double helices in the DNA of cells grown in 14N.
Both 14N/14N and 15N/15N double helices can be found in a 1:1 mixture of DNA produced by cells grown in 14N and 15N.
It contains 14N/14N, 14N/15N, and 15N/15N double helices when DNA from cells grown in 14N and 15N is heated and then cooled in a 1:1 ratio
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Which of the following describes an organism under stress?
They expend more energy to maintain homeostasis.
They use less energy for homeostasis and instead use it for reproduction.
They will not reproduce at all.
Fewer of their offspring will survive.
The following which describes an organism under stress is that they expend more energy to maintain homeostasis and is denoted as option A.
What is Homeostasis?This is defined as the process in which an organism possesses the ability to maintain internal stability which is usually in response to the changes in the environment.
The part of the brain which is referred to as hypothalamus is responsible for the homeostatic activities which occur in the cells of the body. Fir example in the case of the weather being hot, the brain sends signals so as to ensure that there is less production of urine so as to ensure that the individual is hydrated.
This process involves the use of more energy to maintain it and is therefore the reason why option A was chosen as the correct choice.
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can anyone help with: In one or two paragraphs summarize Cellular Respiration. Be sure to include the following words: Cellular respiration, Mitochondria, Cytoplasm, Glycolysis, pyruvates, Krebs cycle, Carbon Dioxide, NADH and FADH2 (high energy electron carriers), electron transport chain, Oxygen, Water, and ATP.
Cellular Respiration is a metabolic process in which mitochondria and cytoplasm work together during Glycolysis, the Krebs cycle, and the electron transport chain. The reactants of these metabolic processes include Oxygen, Water, and the products include pyruvate (in glycolysis), ATP, Carbon Dioxide, NADH and FADH₂ (high energy electron carriers).
What is the process of cellular respiration?The process of cellular respiration is a group of metabolic pathways that generates ATP in aerobic conditions, i.e. in the presence of oxygen which acts as an electron acceptor during the electron transport chain.
The processes of cellular respiration include:
GlycolysisThe Krebs cycleThe electron transport chainTherefore, with this data, we can see that Glycolysis, the Krebs cycle, and the electron transport chain are part of the cellular respiration processes and they work together to generate energy in the form pf ATP.
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Categorize the structures as homologous or analogous. The mammalian tail and the human coccyx (tail bone) differ in their functions, but the close resemblance of these structures indicates a common evolutionary origin. The flippers of both penguins and dolphins help them swim, but the internal structures of the flippers vary. The function of shells in both turtles and crabs is protection, but the anatomy of their shells is different. The leaves of pitcher plants and the spines of cacti are derived from a common ancestral form, but these structures differ in their functions. The bills of ducks and platypuses have similar functions but differing structures.
Flippers from penguins and dolphins, as well as turtle and crab shells, are examples of related organs. While cactus and pitcher plant leaves, as well as the tails of mammals and the human coccyx, are related organs.
Homologous and comparable structures are used to illustrate comparative anatomy. They are essential in figuring out how evolution and ancestry have progressed.
The homologous organs are structurally similar yet serve diverse purposes. Animal tails, human coccyx, pitcher plant, and cactus leaves all have similar physical forms but have diverse purposes.
The analogous organs have the same function even when they have different structures like the shells of turtles and crabs and flippers of penguins and dolphins. The shells protect both turtle and crab, while flippers are used to swim.
Therefore, the shells of turtles and crabs and flippers of penguins and dolphins are analogous organs.
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What environmental factors may affect the type of climax community that develops in an ecosystem?.
Some environmental factors that may affect the type of climax community that develops in an ecosystem are, Biotic - plant population/animal population. Abiotic - climate change, precipitation, temperature, etc. A climax community is described as the final stage of ecological succession.
Climax communities form a continuum that differs across environmental gradients largely characterized by local variations in climatic and edaphic conditions, local disruption regimes, and biotic factors, particularly herbivores.
Climatic and edaphic (soil) factors mostly decide the nature of a climax community. The disparity in climatic conditions and soil structure mainly affects which species can flourish.
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the number of chromosomes in gametes is hapoid.why ?
Answer:
Haploid cells have only one set of chromosomes due to meosis.
Explanation:
Gametes are sex cells.
Gametes contain half the chromosomes contained in a normal diploid cell.
Gametes are produced as a result of meiosis.
During meiosis, the chromosome number is reduced to half and each daughter cell receives half the set of chromosomes.
These gametes unite together to form a zygote.
If both the gametes were diploid, the zygote will have double the number of chromosomes of somatic cells, which in turn results in an abnormal organism.
Thus, gametes have a haploid number of chromosomes.
The _________ regulates homeostasis, the autonomic nervous system, the endocrine system, and the sleep/wake cycle.
The hypothalamus regulates homeostasis, the autonomic nervous system, the endocrine system, and the sleep/wake cycle.
Hypothalamus is the part of the brain that almond-sized and present at the base of the brain. It is the part of the limbic system which controls the behavioral and emotional responses. It is also known as the body's smart control coordinating center.
Homeostasis is the state of dynamic equilibrium in the body. It is when the net loss of the body is equal to net gain. For example, the accurate blood pressure, body temperature, nutrient concentrations are all conditions of homeostasis. If any one concentration changes, then it should be balanced by the action of other.
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A scientist is examining a pedigree that includes several generations of an organism with XX/XY chromosome sex determination.
Which pattern of inheritance would support the hypothesis that the trait being studied is a recessive sex-linked trait found on the X chromosome?
B
A. The trait is only expressed in males who have a father with the trait. The trait is expressed in half of the female organisms and all of the
male organisms.
C. The trait is mostly expressed in males who have a maternal grandfather with
the trait.
D.
The trait is mostly expressed in females who have a paternal grandmother with the trait.
Answer:
C. The trait is mostly expressed in males who have a maternal grandfather with the trait.
Explanation:
A pedigree chart displays a family tree and shows the members of the family who are affected by a genetic trait.
Select all that are possible sources of fixed acids.
a. Body cells
b. Diet rich in animal protein
c. Vegetarian diet
d. Antacids
The appropriate choices are A and B: Body cells and high animal protein diet Compared to bird lungs, human lungs are far less efficient at capturing oxygen from the air.
This is essential for birds because they need more oxygen to absorb the energy from the food they eat because they burn a lot of energy while they fly. Additionally, there are times when birds fly very high in the sky, where there is less oxygen. Health professionals hypothesize that protein from animal sources adds to an increased risk of heart disease since people who consume diets heavy in animal protein often experience more heart attacks than people who obtain their protein largely from plant sources.
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miguel is on a budget, but he is concerned about pesticide residue and wants to buy more organic produce. which of the following foods should he purchase from the organic section based on pesticide absorption?
According to the absorption of pesticides, he ought to get his apples from the organic sector.
Are pesticide traces harmful?Hazardous chemicals, like pesticides, can be categorized as teratogenic (can cause birth defects), neurotoxic (can damage the brain), or carcinogenic (can cause cancer) based on scientific studies of their potential health effects.
Many pesticides are utilised in the food production process. These pesticides may still be present in or on fruits, vegetables, cereals, and other foods in trace amounts (referred to as residues).
In the process of producing food, pesticides are crucial. They could enhance the number of times a crop can be planted on the same piece of land each year as well as protect or boost yields. In nations where there are food shortages, this is especially crucial.
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When muscles are active, cells use nutrients and oxygen at a higher rate and produce waste
chemicals and heat more rapidly. Describe how the interaction of two or more body systems helps
to maintain homeostasis during periods of high muscle activity. (Be sure to identify the two
systems you refer to in your answer.)
The interaction of two or more body systems helps to maintain homeostasis during periods of high muscle activity because to eliminate the waste substances, the circulatory system collaborates with the excretory system.
The circulatory system delivers the oxygen that is taken in by the respiratory system to the cells. An increased heart rate will speed up the delivery of oxygen to the cells since they consume it more quickly. Waste will be created when muscular activity rises, and the excretory system will remove it.
The circulatory system, the digestive system, the excretory system, and the respiratory system are the four major systems that collaborate when there is considerable muscular activity.
Finally, the excretory system eliminates waste from the body that is produced throughout all the activities mentioned above. The circulatory system carries all vital nutrients to every cell in the body, including muscle cells.
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Each of the following is a function of the liver, except
A) synthesis and secretion of bile.
B) antibody production.
C) inactivation of toxins.
D) synthesis of plasma proteins.
E) storage of glycogen and iron reserves
Each of the following is a function of the liver, except B) antibody production.
The storage of glycogen and iron reserves, inactivation of toxins and medications, synthesis of plasma proteins such as album, and production and secretion of bile are all functions of the liver.
What are the 7 functions of the liver?
Bile production and excretion.Excretion of bilirubin, cholesterol, hormones, and drugs.Metabolism of fats, proteins, and carbohydrates.Enzyme activation.Storage of glycogen, vitamins, and minerals.Synthesis of plasma proteins, such as albumin, and clotting factors.Can you live without a liver?
You can't live without a working liver. If your liver stops working properly, you may need a transplant.
Thus, antibody production is not a function of the liver.
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The major histocompatibility complex (mhc) is important in a t cell's ability to?
MHC molecules is to bind peptide fragments derived from pathogens and display them on the cell surface for recognition by the appropriate T cells.
MHC is the tissue-antigen that allows the immune system to bind to, recognize, and tolerate itself . MHC is also the chaperone for intracellular peptides that are complexed with MHCs and presented to T cell receptors (TCRs) as potential foreign antigens.
Both classes of proteins share the task of presenting peptides on the cell surface for recognition by T cells. Major histocompatibility complex (MHC) class I and class II proteins play a important role in the adaptive branch of the immune system.
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Which cellular structure must substances pass through to enter or leave the cell.
plasma membranes
Explanation:
Plasma membranes must allow certain substances to enter and leave a cell, while preventing harmful material from entering and essential material from leaving. In other words, plasma membranes are selectively permeable—they allow some substances through but not others.
Dha and epa, eicosanoids derived from omega-3 fatty acids, reduce blood clot formation and promote heart health. The richest food source of dha and epa is ____________.
Dha and epa, eicosanoids derived from omega-3 fatty acids, reduce blood clot formation and promote heart health. The richest food source of dha and epa is fatty fish.
What are the benefits of EPA and DHA?EPA and DHA have a large number of benefits for our body, the main source of these acids is in fatty fishes such as tuna, anchovies, or salmon. There has an indirect source of EPA in flaxseed oil, leafy vegetables, and nuts. They do not have EPA, they have ALA, which the body converts into EPA, but only really small quantities can be converted.
Fish and seafood or the marine sources are the highest food source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Among the marine sources, fish such as salmon, herring, mackerel and anchovy have the highest content of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).
Therefore, The richest food source of dha and epa is fatty fish.
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