Enzymes often
a-absorb fatty acids.
b- in hydrolysis reactions.
c-serve as a long term source of energy.
d-serve as the structural framework of cell walls.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

this is math not biology xd

protistas excret ethanol used in the manufacture of vinegar