Which characteristics work well in a dichotomous key? a) smooth or rough b) green or round c) triangle or purple d) tall or bumpy

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

Environmental differences within ecosystems are generally caused by

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels