The correct answer is d: cDNA.
<span>cDNA or complementary DNA is DNA synthesized usually from messenger RNA (mRNA) by the enzyme reverse transcriptase. Because this molecule is from mRNA it contains only exons. cDNA is also produced naturally by retroviruses, for example, HIV virus.</span>
Answer:
the well be wind cell are used in isolated locations
<span>Reproduction during which one organism produces genetically identical offspring is called asexual reproduction.</span>
oxygen can only hold two bonds with other elements.
