The evolution of populations due to chance isa)genetic drift.
b. has more effect in large populations than in small populations.
c. gene flow.
d. natural selection.
e. genetic variation.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.