What is the rodent-like mammal with a squat body and padded feet?

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.

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

Describe the structure of a virus, and explain how this structure differs from that of a cell.