DDT is an insecticide that was used extensively in agriculture in the mid-1900s to kill many insect pests including the boll weevil (pictured below), another pest of commercial cotton, DDT was initially effective at controlling boll weevil outbreaks, but after about a decade DDT became much less effective, because many populations of boll weevil had evolved resistance to DDT. Which of the following conditions would biologists say was required for the evolution of DDT resistance in a population of boll weevils? A) Boll weevils in the population learned to adapt to the high levels of DDT in the environment. B) The boll weevil population needed to evolve DDT resistance in order to avoid extinction C) A few boll weevils in the population were resistant to DDT before it was ever used. D) Exposure to DDT caused specific, nonrandom mutations for DOT resistance within the population.
Answers: 3
Biology, 22.06.2019 01:20, hannahpelkey
Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells
Answers: 1
Biology, 22.06.2019 03:10, RiddleMeThis
Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."
Answers: 2
DDT is an insecticide that was used extensively in agriculture in the mid-1900s to kill many insect...
World Languages, 17.12.2020 01:00
Computers and Technology, 17.12.2020 01:00
Mathematics, 17.12.2020 01:00
Mathematics, 17.12.2020 01:00
French, 17.12.2020 01:00
Mathematics, 17.12.2020 01:00