Comparisons of cranial capacity between a. africanus and the later species h. erectus and a. boisei show that h. erectus had much larger brains, while a. boisei had only slightly larger brains, than a. africanus. there is evidence that a. africanus and h. erectus used tools, though the tools made by h. erectus required more skill and planning to craft. how do you think the toolmaking abilities of a. boisei would have compared? (a)a. boisei would have had very little ability to make tools, unlike the other two hominids.(b) a. boisei would have been able to make more advanced tools than the other two hominids. (c)a. boisei would have been able to make tools that were less advanced than h. erectus. (d)a. boisei would have made tools that were less advanced than those made by a. africanus.
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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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Biology, 22.06.2019 09:30
What type of plant is good for a bioassay and where can i buy it? i only have a month.
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Comparisons of cranial capacity between a. africanus and the later species h. erectus and a. boisei...
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