List the two layers of the dermis, from internal to external, and describe their function.

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.

What is the next step in muscle contraction after the actin changes shape? (apex)

Draw the structure of dna nucleotide with adenine as nitrogenous base