9) Choose the best answer. Identify the process by which living organisms stay the same.
A. homeostasis
B. response
C. heterotrophs
D. ectotherm
E. experimentation

10) Choose the best answer.

The cell's ability to maintain the correct amount of water and minerals in it is an example of .
A. heterotrophs
B. response
C. homeostasis
D. ectotherm
E. catalyst

11) Choose True or False.

A species will become extinct if all its individuals stop reproducing.

A. False
B. True

12) Choose True or False.

A dog and cat can reproduce together.

A. False
B. True

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

What is the identity of the planets?

If a human has 23 pairs of chromosomes in every muscle cell of its body how many chromosomes will be in a human egg or sperm