Fleas are commonly seen on the bodies of dogs. these fleas attach themselves to the host and draw blood as nourishment. apart from getting nourishment, fleas also get free shelter and a mode of transport. what kind of an interaction does this exhibit? . a. parasitism. b. competition. c. predation

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.

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

What molecule contains an organisms genetic material, passed down from parents to their offspring