Which ventricle contains a thicker layer of myocardium (heart muscle)?

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.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

What element is able to combine with itself and hydrogen to form large molecules ?