Biology, 12.02.2021 16:20 Travon7956

The Diagram shows a plant cell with several structures numbered?

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Biology, 22.06.2019 01:30, iBrain

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Biology, 22.06.2019 02:50, mccay5016987

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?

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Biology, 22.06.2019 03:00, bob8939

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

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Biology, 22.06.2019 03:30, Savannahh8503

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins