There are five conditions that can cause evolution to occur: 1) nonrandom
mating; 2) small population size; 3) immigration or emigration; 4)
mutations; and 5) natural selection. Pick one of these and explain how it
can cause one species to split into two species. Provide an example.

we would need to see the picture to answer it

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.