An enzyme is a biomolecule that increases the rate of a chemical reaction. an enzyme is a kind of

catalyst

Explanation:

Enzymes are proteinous molecules that functions as to speed up the rate of reactions in living organisms.

Catalysts are substances that speeds up the rate of chemical reactions.

Both enzymes and catalysts are not used up during reactions.

Hence, an enzymes are considered to be a kind of catalyst in biological systems.

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation:

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands