Biology, 19.12.2019 19:31 raulflores01
When they were first sold, certain insecticides were highly effective in killing mosquitoes. today, dozens of mosquito generations later, a much smaller proportion of these insects die when sprayed with the same chemicals. fewer insects are killed today because
a. mosquitoes are deliberately adapting themselves to this man-made change in the environment
b. mosquitoes that survive spraying develop an immunity to the insecticide
c. many mosquitoes today are descendants of mosquitoes with insecticide-resistant characteristics
d. the original spraying has caused a permanent mutation, giving the insects genetic resistance to the spray
Answers: 3
Biology, 22.06.2019 01:00
Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation
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Biology, 22.06.2019 12:00
The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.
Answers: 1
When they were first sold, certain insecticides were highly effective in killing mosquitoes. today,...
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