What happens to energy as it moves up the pyramid? Energy availability increases.
O Energy availability decreases.
O Energy production outweighs energy consumption.
Energy production and consumption become equal.

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.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Actual age your first developed of age well comparison age refers to absolute age true or false