Some types of bacteria can reproduce every 20 minutes under ideal conditions. If a single bacterium begins to reproduce at this rate, what is the best estimate of how many bacterial cells there will be after 80 minutes?

8

16

40

80

When a cells volume becomes to great for the surface area to maintain the cell will A) die. B) divide. C) grow. D) move.

A scientist wants to know whether a particular cell is round or rectangular. How should the scientist observe the overall shape of the cell? O A. The scientist should use an electron microscope. O B.

How is artificial selection different from natural selection examples?

When scientists use their five senses to learn new information, it is called:

During which period of the Paleozoic Era did the first amphibians evolve? A. Permian B. Devonian C. Cambrian D. Carboniferous

Which statement best describes messenger RNA? [Multiple Choice] A. It transfers polypeptides to the nucleus. B. It's chemically more complex than DNA. C. It had one Oxygen atom less than DNA. D. It's composed of a single strand of nucleotides.

An allele that masks another allele is known as

Is there penicillin in acyclovir

Noah wants to show the largest source of carbon on Earth for his school project. According to his research, in which form is most of the carbon on Earth stored?

True or false: most drugs are eliminated by the kidneys in urine although some are excreted in saliva, sweat, or exhalation. a. True b. False