Since parent of both Justin and his wife Brittany have blood group ab, this means Justin is homozygous(aa) for blood group a and similarly his his wife Brittany is also homozygous (bb) for blood group b. Therefore, Justin and Brittany's son Theodore will certainly have ab blood group.
About 65 days after planting
Punnett square you would use to find that out
the answer is D: oxygen, how did u not know that?
Generally speaking, it would not affect the organism. For humans, we regularly replace our cells in our body, so even when our cells die, we are fine.