After which event has evolution occurred?
a. a new predator comes into an environment
b. an individual is born with 6 fingers on one hand instead of 5
c. an animals white winter coat is replaced by a darker coat in the spring
d. an allele frequency in a population changes over time

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.