B because it’s talking about the tree itself. Saying that it’s plants would divert it to a different plant. The cells of the wood is what makes the tree and is relevant to the question
Alligators,crocodiles,caimans and lizards
The cardiovascular system I think. Hope this helps
its H because his maternal grandfather is on his moms side of the family and has the recessive allele not his grandfather on his dad's side
