Many mosquito populations today are resistant to pesticides that were historically effective. this pesticide resistance arose in these populations because: a) the pesticides caused mutations in the dna of mosquitoes that conferred resistance phenotypes, and these mutations were passed on to subsequent generations. b) populations had to develop tolerance in order to survive. c) individual mosquitoes build up immunity to the pesticides after exposure. d) some individuals were resistant to the pesticides before they were used, and those mosquitoes were more likely to survive and reproduce. e) these populations were outside the range of the original pesticide application.

d) some individuals were resistant to the pesticides before they were used, and those mosquitoes were more likely to survive and reproduce

Explanation:

A small proportion of the mosquitoes may survive exposure to the pesticides as a result of their distinct genetic constituents. Such individuals transfer the genes for resistance to the next generation

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

you can have just about every answer you can think of