Help me out really appreciate it

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.

How was the climate when the ambulocetus was alive

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins