Imagine you are listening to a series of student presentations in which the speakers hypothesize about the kinds of marine life they would expect to find in an abyssal marine zone. which hypothesis do you find most compelling?
a) autotrophic organisms like seaweed and plankton will be common, along with many larger organisms supported by these producers.
b) coral reefs and high species diversity are expected, with many kinds of fish and invertebrates.
c) large open-ocean fish will live there, like tuna, marlin, and sharks.
d) low species diversity is predicted, except around hydrothermal vents where bacteria, fish, and crabs live.

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?

The chemical form of energy that is useable by the cell to do work

Which of the following is a testable hypotheses?