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oksian1 [2.3K]
3 years ago
8

Describe the difference between natural selection and evolution in three sentences.

Biology
1 answer:
Allisa [31]3 years ago
4 0

Answer:

Evolution is a gradual change in the inherited traits of a population over many generations. Natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass on their genes.

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Cross a person who does not have freckles and is heterozygous for dimples with a person who has
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Answer:

1. 1/2

2. 1/2

3. 1/4

Explanation:

Let the allele for freckles be A or a while that of dimples be B or b.

A person without freckles but heterozygous for dimples = aaBb

A person who has freckles (whose mother has no freckles) but no dimples = Aabb

      aaBb    x    Aabb

Offspring

4 AaBb - freckled and dimpled

4 Aabb - freckled and non dimpled

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4 aabb - non freckled and non dimpled

1. <em>Probability that the parents will have a dimpled child</em> = 8/16 or 1/2

2. <em>Probability that they will have a child with freckles</em> = 8/16 or 1/2

3. <em>Probability that they will have a child with freckles and dimples</em> = 4/16 or 1/4

<u>See the attached image for the Punnet's square analysis of the cross</u>

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3 years ago
Susan wants to see how different chemicals in the soil affect plant growth. Therefore, she gets all of the same type of plant, s
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The independent variable is the plant growth or how much the plants grow.
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A dehydration synthesis reaction is best described as a chemical reaction in which
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two molecules or moieties combine to form one single molecule, together with the loss of a small molecule. When this small molecule is water, it is known as a dehydration reaction; other possible small molecules lost are hydrogen chloride, methanol, or acetic acid.

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Why can polyploidy individuals lead to speciation fairly quickly?
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As the generations pass, the accumulation of these changes tend polyploid to speciation.

8 0
3 years ago
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