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25-11-2022
Biology

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1. when investigating genes that play a role in the development of the sensory nervous system, it is discovered that a gene known as sense1 is active at higher levels in the embryos of cave crayfish than in embryos of surface crayfish. when the level of activity of sense1 is artificially increased in embryos of surface crayfish they develop without eyes and with long antennae. of the following hypotheses, which best explains how cave crayfish have lost their eyes? a. in the cave population, the sense1 gene appeared, causing crayfish to lose their eyes and improve their sense of smell. b. in the cave population, mutations in sense1 that increased its activity appeared repeatedly and more frequently over time. c. in the cave population, a mutation that increased the activity of sense1 became more frequent in cave crayfish over time because it also improved sense of smell. d. in the cave population, crayfish lost their eyes over time because they did not use them.

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