The circulatory system of mammals has a chambered heart.
a. two
b. three
c. four
d. one

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis

Which of the following describes how binary fission and mitosis are similar? a)they are both used for growth or repair b)they both break down membrane-bound nuclei c)both invoke the replication of a single stand of dna d)both replicate genetic material