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Elena-2011 [213]
3 years ago
7

What is natural seletion

Biology
2 answers:
12345 [234]3 years ago
5 0
Natural selection is basically nature choosing desired traits in an animal that give it a survival advantage, for example mice with padded feet are not detected by predators as much because they don't make as much noise, they can then keep passing on that gene to different generations

abruzzese [7]3 years ago
4 0
<span>Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
</span>
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rosijanka [135]

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Which of the following would be bigger than the others? a polymer b glucose c amino acid d monomer
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Black_prince [1.1K]
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) During the germinal period, the fertilized ovum duplicates and forms a blastocyst. This hollow ball of cells ________.
Vedmedyk [2.9K]

Answer:

C - Contains the embryonic disk

Explanation:

After an egg is fertilized, it begins to divide into smaller cells, from the 1 cell stage, to 2, to 4 and so on. Then, on the third day, the cells fall within 16-200 cells and it is then called a <em>morula</em>.

On the fifth day, the morula becomes a ball of calls which is now differentiated into an <em>inner cell mass and a trophectoderm</em>. The inner cell mass becomes the <em>embryo</em> as development goes on and the trophectoderm, becomes the <em>placenta</em>.

As development goes on further, the floor of the amniotic cavity is formed by the embryonic disk, a layer of prismatic cells derived from the inner cell mass.

The embryonic disc develops into 3 layers:

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There is a major differentiation of cells which gives a template  for the origin of development of specific organs of the embryo.

3 0
3 years ago
The lifetime of NO is 5 - 10 minutes. <br><br> a. True<br> b. False
Flauer [41]

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Explanation:

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7 0
3 years ago
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