When they were first sold, aerosol insecticides were highly effective in killing flies and mosquitoes. now, several decades later, a much smaller proportion of these insects die when sprayed. the reason fewer insects die when they are sprayed is that
a. the original spraying has caused a permanent mutation, giving the insects genetic resistance to the spray.
b. mosquitoes are deliberately adapting themselves to this man-made change in the environment
c. mosquitoes that survive spraying develop an immunity to the insecticided.
c. many mosquitoes today are descendants of mosquitoes with insecticide-resistant characteristicse.
d. none of the listed responses is correct.
Answers: 3
Biology, 22.06.2019 02:30, maleyjustinr
Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil
Answers: 1
Biology, 22.06.2019 04:00, dnarioproctor
Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. albino x albino a) 1/4 chinchilla, 3/4, agouti b) 3/4 albino, 1/4 chinchilla c) all albino
Answers: 3
When they were first sold, aerosol insecticides were highly effective in killing flies and mosquitoe...
Mathematics, 22.04.2021 04:40
English, 22.04.2021 04:40
Mathematics, 22.04.2021 04:40
English, 22.04.2021 04:40