The variables that stay the same to keep the experiment fair. Ex same amount of sunlight

What type of genetic drift would be simulated if all the beans that were not selected died out?

Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false

What do all of the above organisms have in common