A dichotomous key uses O inferences.
O DNA sequences.
O subjective descriptions.
O observable characteristics.

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.

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change