WILL BE MARKED BRAINLIEST
A structural adaptation that aids the movement of aquatic animals is .
a. very light bones
b. a streamlined body
c. cephalization
d. muscular limbs
e. hollow bones

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.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

Nucleic acids offer variability because they contain alternate forms of genes called .