According to cell theory, all cells carry out the functions needed to sustain life. that means all cells must contain a) dna. b) a nucleus. c) organelles. d) a control center.

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

What advantages does a pedigree have over a written passage?

What are some natural processes that represent physical and chemical changes?