The first amphibians evolved about 400,000 years ago.
True or False?...
Biology, 23.11.2020 04:20 elizabethluna058
The first amphibians evolved about 400,000 years ago.
True or False?
Answers: 3
Biology, 22.06.2019 02:50
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?
Answers: 1
Biology, 22.06.2019 13:50
The fluid mosaic model of the membrane proposed that membranes
Answers: 1
Biology, 22.06.2019 23:00
Alizard lives in a desert. which would be an adapation for this lizard?
Answers: 2
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