The year 1916 was a leap year which means she celebrates her birthday once every 4 years on another leap year. There have been 26 leap years since 1916.
What is a leap year?
It is a calendar year that contains an additional day added to keep the calendar year synchronized with the seasonal year. Each leap year has 366 days instead of 365, by extending February to 29 days rather than the common 28 days. These extra days occur in each year that is an integer multiple of 4.
Here woman was born on 29 February. The date 29 February comesw every four years. So in a century it would come 25 times and another time in the next four years.
Birth year : 1916
Current year : 2020
Difference : 104 years
Leap year comes every four years. So in 104 years it would come 26 years.
Hence assuming the woman in question was born on February 29th, that means she celebrates her birthday once every 4 years on another leap year.
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Which terms best describe the class of questions that insel and young were addressing when they studied the effect of antidiuretic hormone on monogamous voles by experimentally increasing the number of receptors in the brain?.
When insel and young explored the impact of antidiuretic hormone on monogamous small mammals by experimentally increasing numberbrain, they were addressing a class of topics that could be described as proximal
How does mechanistic biology work?A mechanism is a group of causally interconnected pieces and activities that result in one or more effects in the study of biology. By defining the mechanisms that can cause the phenomenon, scientists might explain it.
A mechanistic research is what, exactly?The goal of MMB is to comprehend biochemical, physicochemical, as well as cellular interactions at the molecular. MMB is a vibrant, interdisciplinary community that was created by a collaboration between BCMP and experts in cell biology.
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when loading the protein samples on the sds-page gel, what component of the sample buffer is responsible for ensuring the protein sample "falls" to the bottom of the sample well?
Electrophoresis is the process of separating macromolecules in an electric field. A discontinuous polyacrylamide gel is used as a support medium and sodium dodecyl sulfate (SDS) is used to denature the proteins in a method that is widely used to separate proteins by electrophoresis.
Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis is the name of the procedure (SDS-PAGE). The most popular technique is also known as the Laemmli method, after U.K. Laemmli, who was the first to apply SDS-PAGE in a scientific investigation and write a paper about it. SDS, also known as lauryl sulfate, is an anionic detergent, which means that its molecules have a net negative charge when dissolved over a broad pH range.
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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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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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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.
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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the Art OF beautiful handwriting
Answer:
what is the question?
cause i am not sure what you are asking
Which step in photosynthesis does not need light
Answer: carbon fixation phase
Explanation:
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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Which of the following statements is not true of most cellular redox reactions?
a. The reactant that is oxidized gains electrons, acting as a reducing agent.
b. The reactant that is reduced loses electrons.
c. The electron acceptor is reduced, acting as an oxidizing agent.
Most cellular redox reactions The electron acceptor is reduced, acting as an oxidizing agent. Correct option is C The reduction of the electron acceptor makes it an oxidizing agent. Protons are transported through a membrane in a direct relationship with the redox processes of the electron transport chain.
The oxidative phosphorylation process, also known as the electron transport chain, is a collection of four protein complexes that couple redox reactions to produce an electrochemical gradient that results in the production of ATP. A reaction that happens when an oxidizing substance and a reducing substance come into contact. In the reaction, the reducing substance gains electrons while the oxidizing substance loses electrons.
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You discover a population of seals and find it to be at hardy–weinberg equilibrium with respect to the a locus. Suppose that there are two alleles at this locus and the frequency of one of those alleles is 0. 4. Of the individuals that carry at least one copy of that allele, what percent are homozygotes?.
Of the individuals that carry at least one copy of that allele, about 25 percent are homozygotes, which means that option B would be the right answer.
Hardy Weinberg equilibrium is the condition which suggests that genotype frequencies in a population remain constant between different generations in the absence of disturbance by outside factors. It is the guiding principal of population genetics. To ensure that frequencies remain constant, it must be ensured that mating is avoided, there is no migration or emigration of species, natural selection is stopped and the population pool size is large. The formula for calculating the frequency of alleles is given as
p + q = 1
where p is frequency of S
where q is frequency of s
According to question, q = 0.4
p = 1 - q
p = 1 - 0.4
p = 0.6
The number of heterozygotes and homozygotes can be found using the formula
p² + 2pq + q² = 1
where p² = frequency of SS
2pq = frequency of Ss
q² = frequency of ss
So, the value of 2pq = 2×0.4×0.6 = 0.48
q² = (0.4)² = 0.16
Now to find fraction of homozygotes (ss) of the individuals that carry at least one s allele, we need to divide the frequency of homozygotes ss into the frequency of heterozygotes that is
Ss = 2pq/q² = 0.16/0.64
Ss = 0.25 or 25%
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To refer to complete question, see below:
You discover a population of seals and find it to be at Hardy-Weinberg equilibrium with respect to the A locus. Suppose that there are two alleles at this locus and the frequency of one of those alleles is 0.4. Of the individuals that carry at least one copy of that allele, what percent are homozygotes?
a) 10
b) 25
c) 60
d) 15
e) 40
During replication, the enzyme dna uses energy from atp to separate the two strands. This generates additional coiling ahead of the replication fork that is alleviated by another enzyme called dna.
During replication, the helicase DNA uses energy from ATP to separate the two strands. This generates additional coiling ahead of the replication fork that is alleviated by another enzyme topoisomerase called DNA.
What specific enzyme actually divides the two DNA strands during replication?Enzymes called helicases bind to nucleic acid or nucleic acid protein complexes and may even alter them. Helicases exist for both DNA and RNA. DNA helicases are necessary for DNA replication because they convert double-stranded DNA into single strands, enabling the replication of each strand individually.
The enzyme DNA helicase goes along the DNA strands and breaks the hydrogen bonds between the bases, unwinding or unzipping the DNA and separating the two strands.
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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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a man has just learned that he has a blockage in one of his arteries. which of the statements is true regarding this blockage? please choose the correct answer from the following choices, and then select the submit answer button. answer choices this blockage will likely increase the resistance to flow in his circulatory system, and as a result, will decrease the rate of blood flow. this blockage will likely increase the resistance to flow in his circulatory system, and as a result, will increase the rate of blood flow. this blockage will likely decrease the resistance to flow in his circulatory system, and as a result, will decrease the rate of blood flow. this blockage will likely decrease the resistance to flow in his circulatory system, and as a result, will increase the rate of blood flow.
This blockage will likely increase the resistance to flow in his circulatory system, and as a result will decrease the rate of blood flow.
Blood vessels in the circulatory system transport blood away from and towards the heart. Arteries transport blood away from the heart, while veins transport blood back to the heart. The circulatory system transports oxygen, nutrients, and hormones to cells while also removing waste products such as carbon dioxide.
Vascular disease (vasculopathy) affects the blood vessels that transport oxygen and nutrients throughout your body and remove waste. Plaque (made of fat and cholesterol) slows or blocks blood flow inside your arteries or veins, causing common vascular problems. When there is too much cholesterol in the blood, the cholesterol and other substances can combine to form deposits (plaques) on the artery walls. Plaques can cause an artery to narrow or become blocked.
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which anatomical area allows for reproduction? which anatomical area allows for reproduction? primary sex characteristics schemas teratogens sex-linked genes secondary sex characteristics
The ovaries and testes are the two main reproductive organs, or gonads. Gametes, including the egg and sperm, as well as hormones, are created in these organs.
What part of the body controls reproduction?The ovaries and testes are the primary reproductive organs, or gonads. These organs are in charge of producing egg and sperm cells, as well as gametes and hormones.
The reproductive system's primary function is to ensure the survival of the species. Other systems in the body, such as the endocrine and urinary systems, work constantly to keep the individual's homeostasis.
An individual can live a long, healthy, and happy life without bearing children, but for the species to survive, at least some individuals must bear children.
The uterus, two ovaries, two fallopian tubes, the urethra, the pubic bone, and the rectum comprise the internal reproductive anatomy. The endometrium is the inner lining of the uterus.
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__ refers to the fact, that, if the conditioned and unconditioned stimuli are not paired for a given number of trials an organism will stop exhibiting the conditioned response.
Extinction refers to the fact that, if the CS and UCS are not paired for a given number of trials, an organism will stop exhibiting the CR.
When the entire species dies or gets eradicated it is called extinction. When the number of species decreased due to environmental, as well as when individual species members undergo evolutionary changes (genetic inbreeding, poor reproduction, decline in population numbers) extinction occurs.
Extinction rates vary greatly.
The majority of species that have ever lived on Earth have gone extinct, but the fossil record reveals five particularly large extinctions, known as mass extinction events, many species extinct due to this. The majority of extinctions, which happen continuously and are referred to as background extinctions, are distinguished from these glaring declines in diversity by the term "mass extinction."
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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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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.
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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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.
do nutrients and oxygen pass through the walls or your artieries and into your cells
Answer:
Yes
Explanation:
Trust me bro. Look it up on Bi(n)g not Go(o)gle
which of the following is an antigen that would be recognized by a helper t cell? a. a bacterium inside a cell b. a virus inside a cell c. an uninfected human cell d. the malaria parasite inside a red blood cell e. a bacterium outside a cell
A bacterium inside a cell is an antigen that would be recognized by a helper t cell
What is an antigen ?Any chemical that triggers the body to mount an immunological defence against it. Toxins, chemicals, germs, viruses, and other foreign substances are examples of antigens. Cancer cells and other body tissues and cells contain antigens that might elicit an immune response.
When class II MHC protein is present, often on the surface of an antigen-presenting cell, T helper cells can detect viral peptides (APC). If the binding affinities are high enough, these interactions lead to the activation, proliferation, and differentiation of T helper cells.Learn more about Antigen here:
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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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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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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 porphyria has a defect in the ferrochetalase enzyme within the rbc, causing redness, edema and burning when exposed to light?
The porphyria having a defect in the ferrochetalase enzyme within the rbc is known as Erythropoietic protoporphyria or (EPP).
What is Erythropoietic protoporphyria?
Erythropoietic protoporphyria is a metabolic disorder which is caused by the deficiency of a specific enzyme called ferrochelatase.
When certain types of mutations occur in the body, it leads to the severs deficiency of ferrochelatase which causes Erythropoietic protoporphyria disorder.
Simply put, Erythropoietic protoporphyria is an inherited disease or disorder that shows its symptoms when sunlight falls on the body and is responsible for burning, acute pains, edema and erythema in the body.
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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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At a gaba-ergic synapse, the postsynaptic receptor for the gaba neurotransmitter is which type of channel?.
Benzodiazepines, one of the most commonly prescribed groups of psychoactive drugs, are positive allosteric modulators of GABAA receptors.
What is Gamma-Aminobutyric Acid (GABA) ?GABA stands for gamma-aminobutyric acid, which is the primary inhibitory neurotransmitter in the developmentally mature mammalian central nervous system. Its primary function has to reduce neuronal excitability throughout the nervous system. In many countries, GABA is sold as a dietary supplement.
GABAA receptors has been ligand-activated chloride channels that allow chloride ions to flow across the cell membrane when activated by GABA. The direction of the chloride flow determines whether it has depolarizing, shunting, or inhibitory/hyperpolarizing.
Therefore, Benzodiazepines, one of the most commonly prescribed groups of psychoactive drugs, are positive allosteric modulators of GABAA receptors.
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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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