A dandelion. It's so puffy that it can't stay alive for more than a few week around where I live. They all scatter up...
Answer:
A. DNA polymerase
Explanation:
DNA polymerases (I,II,III) proofread the DNA, which helps to catch errors. Errors can be fatal to expression, creating misformed proteins or unclear information, so this is necessary.
Fun facts - the coronavirus is a retrovirus, so it doesn't proofread. That makes it much harder to find a vaccine, because it can generate new strains by the very fact of not proofreading.
Your lymph nodes or "thymus" promotes the maturation of t cells.
DNA Ligase enzyme.
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