Mangrove trees are an important part of a mangrove wetland community. Other populations of plants and animals in this community rely on mangrove trees for food and shelter. Which of these is a limiting factor on mangrove community populations that is unrelated to the density of mangrove trees? A. New leaf growth per month
B. Severity of hurricanes per season
C. Amount of sediment trapped per years
D. Size of stilt-like root systems per tree

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?

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.

Si units are the modern form of the