Amolecule that receives and sends signals is called a
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Biology, 21.06.2019 22:00
This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic
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Biology, 21.06.2019 23:30
The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2
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Biology, 22.06.2019 02:30
Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers
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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?
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Health, 24.07.2019 01:30
Health, 24.07.2019 01:30
Health, 24.07.2019 01:30
Health, 24.07.2019 01:30
Health, 24.07.2019 01:30
Health, 24.07.2019 01:30
Health, 24.07.2019 01:30
Computers and Technology, 24.07.2019 01:30
Computers and Technology, 24.07.2019 01:30
Computers and Technology, 24.07.2019 01:30
History, 24.07.2019 01:30