How does meiosis help the chromosome number of a species remain constant? a) by causing gametes to have half the species' chromosome number
b) by combining all the pairs of the species' chromosomes
c)by eliminating the chromosomes that the species no longer uses
d) by saving energy so the species can maintain its chromosomes

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added