Warm-Up Type your response in the box. Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of a scientific theory? Do you think it should be a scientific law? Explain your response. B I U X X Font Sizes A A : Bullet list Characters used: 0 / 15000 Submit g Sign Out

The number of living organisms in a particular area is

Which describes how weathering and erosion are different? weathering is caused by water. erosion is caused by wind and ice. erosion transports sediments. weathering is a natural process.

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?