Look here for an indepth explanation
<span><span>https://www.boundless.com</span>/.../evidence-of-evolution-498-11724</span><span>
</span><span><span>planetward.org/files/change_over_time</span>0001.pdf</span><span>
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Because of the nitrogen cycle all of the above answers are correct
Answer:
With respect to the composition of DNA, in an analysis it can be found that the proportions of nucleotides are A + C = G + T (option a).
Explanation:
The proportion of nucleotides in a DNA molecule can be established according to the sequence of these nucleotides on both complementary strands, since the purinic bases of one strand are complemented by the pyrimidinic bases of another:
- <em>Adenine is complemented with Thymine A=T</em>
- <em>Guanine is complemented with Cytosine G=C</em>
From this we can deduce that in a DNA molecule with two chains there will be the same amount of adenine and thymine, as well as the same number of guanine with respect to cytosine, so:
<em> A + C = G + T</em>
An example of this would be a known DNA molecule (hypothetical), with 5 molecules of Adenine and 7 molecules of Guanine. In this case there are 5 Thymines, complementary with Adenine, and 7 Cytosines like Guanine:
<em> A + C = G + T</em>
<em> 5 + 7 = 7 + 5</em>
<span>indicate a common ancestor exists between two organisms
</span>
NOT:
result from evolution in a similar environment
are features which organisms still have but no longer use
<span>develop when a mutation occurs in the DNA of an organism</span>
