What do you predict are three abiotic causes of declines in seagrass communities? a. aquaculture development, predation, and over fishing. b. climate change, reduced plant reproduction, and increasing severity of tropical storms. c. industrial and agricultural runoff, coastal infrastructure development, and dredging. d. overpopulation of sea turtles, urchins, and crabs

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

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?

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?