John notices that column d is not showing on his spreadsheet. what action does he need to take to view column d?

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.

The body is protected against harmful flu viruses by

Why should organisms reproduce more offspring than will survive? select all that apply.