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melisa1 [442]
3 years ago
5

Why single ovum is produced by oogenesis?

Biology
2 answers:
kompoz [17]3 years ago
7 0

Answer: The one egg cell that results from meiosis contains most of the cytoplasm, nutrients, and organelles needed so therefore it does not need all four eggs.

Lelu [443]3 years ago
3 0
The fertilized egg must have enough cytoplasm to be able to divide repeatedly into the first few dozen cells of the embryo.
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4 0
3 years ago
Norepinephrine, serotonin, and dopamine are all examples of _______.A. bodily humors. B. synaptic clefts.
Hatshy [7]

The question is incomplete as it does not have the options which are:

A.bodily humors. B.synaptic clefts. C.neurotransmitters. D.growth hormones.

Answer:

The correct answer will be option- C

Explanation:

Neurotransmitters are the chemicals released from the neurons at the synaptic junctions which helps in the transmission of the electrical impulse from one neuron to another.

The dopamine, serotonin and nor-epinephrine are the biogenic forms of neurotransmitters which are synthesized from the precursors of the amino acids. These neurotransmitters are produced in producing different functions in the body.

Thus, option- C is the correct answer.

6 0
3 years ago
5.Each chemical element is made up of only one kind of *
krek1111 [17]
Each element is made of only one kind of atom
5 0
3 years ago
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Shalnov [3]

Answer:

b

Explanation:

3 0
3 years ago
Why do biologists measure the number of trophic levels in an ecosystem?
slega [8]

Answer:

Biologists measure the number of trophic levels in an ecosystem so as to check its stability and health.

Explanation:

Trophic levels are the feeding position in a food chain such as primary producers, consumers, etc. They are positions that an organisms occupies in a food chain (series of steps in which organisms transfer energy by eating or being eaten);- what it eats and what eats it. 

Theoretically there is no any limit to the number of trophic levels in a food chain or number of organisms that live on each level.

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3 years ago
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