These models represent molecules that play a role in the immune system.

In which two ways do these molecules fight pathogens in the body?

OA. They recognize specific pathogens in the body.

DB. They bind to pathogens that enter the body.

c. They eat pathogens that attack the body.

DD. They carry pathogens out of the body.

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.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.