Biology, 18.01.2020 14:31 isabel2007riverton
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: 2
Biology, 22.06.2019 01:00
Nucleic acid certain protein cell membranes certain carbohydrates
Answers: 3
Biology, 22.06.2019 14:00
Homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?
Answers: 1
Biology, 22.06.2019 23:00
Why is there more biomass at the producer level that at the consumer levels ? how does this relate to the 10% rule ?
Answers: 2
Mosquitoes in tropical regions can carry and transmit the malaria parasite to humans. the mosquitoes...
Chemistry, 14.01.2021 08:40
English, 14.01.2021 08:40
Geography, 14.01.2021 08:40
Mathematics, 14.01.2021 08:40
Geography, 14.01.2021 08:40
English, 14.01.2021 08:40
Mathematics, 14.01.2021 08:40
Mathematics, 14.01.2021 08:40
Mathematics, 14.01.2021 08:40
History, 14.01.2021 08:40