Proteins can not be transported by carrier proteins through cell membranes because A.) they are lipid soluble

B.) they are very large molecules

C.) they contain nitrogen

D.) the membrane is made of protein

The answer is B - proteins are large molecules

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products