If we use the criteria of cell numbers, then _______ are the dominant life form on the planet.

Question

Quizplus · Accepted Answer

Bacteria are unicellular organisms and their total number on the planet is estimated to be around 5 x 10^30, which is several orders of magnitude higher than any other type of organism. Viruses are not considered alive and do not have cells. Humans, cockroaches, and reptiles are multicellular organisms and do not have as high a number of cells as bacteria.

If We Use the Criteria of Cell Numbers, Then _______