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kobusy [5.1K]
4 years ago
10

Natural selection could not occur without?

Biology
1 answer:
11111nata11111 [884]4 years ago
3 0
I believe it’s variation
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During Prophase 1, chromosomes from each parent pair up
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Why is glycolysis thought to be one of the earliest of all biochemical processes that evolved?
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which of the following explains why cells that contained mitochondria like organelle had an evolutionary advantage
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Answer:

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____ heya mate______

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7 0
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If an atom has a mass number of 23, which of the following is always true? A. The number of protons in the nucleus does not equa
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The correct answer will be A;

A) The number of protons in the nucleus does not equal the number of neutrons.

A=mass number:
Z=atomic number (= number of protons)
N=number of neutrons:

A=Z+N

If the number of protons in the nucleus is equal the number of neutrons , we would have an even mass number; because Z=N=x; then A=x+x=2x  (this is always an even number) but  23 is an odd number, therefore the number of protons in the nucleus does not equal the number of neutrons. 
3 0
3 years ago
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