All organisms originated from different ancestors.
a. archaea are more closely related to bacteria than eukarya.
b : all organisms originated from a common ancestor. organisms on different branches of the phylogenetic tree often have similar morphology.
c : all organisms originated from a common ancestor. proteins that carry out the same functions often have similar sequences across organisms.
d : all organisms originated from different ancestors. organisms living in similar ecosystems are genetically closer to each other than those living in different ecosystems.