Which of the following is an observation made by darwin that supports his theory of natural selection?
a. insects never produce offspring.
b. all organisms that are born survive.
c. more organisms are born than can survive.
d. insects produce many offspring but produce few eggs.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

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