C. Vestigial structure is the correct answer
I think the answer is B
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Prokaryotic cells lack a nucleus.
Answer:
tRNA
Explanation:
transfer RNA (tRNA) assembles the protein (one amino acid at a time)
The source of the sun's fuel is hydrogen and helium gases. Through a special chemical reaction, called nuclear fusion, the hydrogen gas is "burned" releasing an enormous amount of energy in the form of light and heat.