Individual cells do not survive for the entire lifetime of an organism because a. the enzyme telomerase is readily destroyed by the environment, resulting in cell death. b. dna replication is subject to errors that cause cell death. c. okazaki fragments disrupt protein synthesis, resulting in cell death. d. the repeating telomeric sequence of ttaggg interferes with normal dna replication and leads to cell death.

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.

Cells destroy body cells infected by a virus or bacteria.

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from