how does skin protect the body from pathogens A. It has hairs that sweep pathogens away from the body B. It transfers pathogens to lymph and blood plasma C. It produces white blood cells that recognize and eat pathogens D. It traps pathogens in oil and sweat produced by glands

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.

Why is it incorrect to say that mitochondria function only as energy factories with cell

What is the compliment dna strand to the following sequence: ttgactaggcta