What does the biological species concept use as the primary criterion for determining species boundaries? a. mole?

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

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