4. which of the following statements about reinforcement is true?
a. reinforcement increases the number of intermediate phenotypes.
b. reinforcement is a type of natural selection.
c. reinforcement decreases the morphological difference between two incipient species.
d. reinforcement is also called dispersive selection

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)

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