Answer:
Cave fish lack eyes and scales
The middle of a flower is called the stigma.
Answer:
The molecule that is able to go back and correct an error in the DNA nucleotide sequence is DNA polymerase (option B).
Explanation:
DNA polymerase is not only the enzyme that contributes to the polymerization of a new DNA strand during the replication process, but it can also correct errors in synthesis, such as when a mismatched nucleotide is placed.
Once an error has been detected during synthesis, the DNA polymerase —acting as a 3'-5'- exonuclease— reverses the process, the direction of synthesis, to correct the error which in this case is the mismatched nucleotide.
The other options are not correct because:
<em> A. </em><u><em>DNA proofreadasa </em></u><em>does not exist.
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<em> C. </em><u><em>Helicase</em></u><em> breaks the hydrogen bridges that bind the nucleotides allowing the separation of the DNA strands. In some cases, it also acts as a DNA repairer
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<em> D. </em><u><em>DNA Primase</em></u><em> is responsible for the synthesis of primers.</em>
