Biology, 21.07.2019 16:20 cadecurtis
(genius/ace only) mosquitoes in tropical regions can carry and transmit the malaria parasite to humans. the mosquitoes used to be killed in these regions by spraying them with the insecticide ddt. the mosquitoes that were earlier sensitive to ddt are now not killed by ddt and grow and multiply even in the presence of ddt. how can you explain this phenomenon? a. all of the mosquitoes must have undergone a mutation for ddt resistance and produced similar kind of resistant offspring, which evolved into a ddt resistant population. b. some of the mosquitoes must have undergone a mutation for ddt resistance and produced similar kind of resistant offspring, which would have been selected by nature. c. all of the mosquitoes must have slowly increased their tolerance level to ddt and ultimately would have become completely resistant to ddt.
Answers: 1
Biology, 22.06.2019 14:30
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Biology, 22.06.2019 17:00
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In cattle a single gene with two alleles determines fur color the fur can be red white or roan roan fur has both red and white hair which of the following statements is true a the allele for roan fur color is dominant over red and white fur color b the allele for red fur color is dominant over white and roan fur color c the roan and white alleles are expressed independently of the other d the red and white alleles are expressed independently of each other
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Biology, 22.06.2019 20:30
If the charge that enters each meter of the axon gets distributed uniformly along it. true or false
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(genius/ace only) mosquitoes in tropical regions can carry and transmit the malaria parasite to huma...
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