What is the simplest form of genetic material that can undergo a mutation?

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?