share the two pairs of species that share the greatest genetic similarity based on the results of the gel electrophoresis

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

What does it mean for a cell membrane to be selectively permable

Why is excretion necessary to maintain homeostasis?