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
Answer: d) some individuals were resistant to the pesticides before they were used, and those mosquitoes were more likely to survive and reproduce
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Genomics is the study of
A. the information content of genomes. B. the gene products that genomes encode. C. the molecular organization of genomes. D. All of the choices are correct.
To form the blood brain barrier, capillary epithelial cells are sealed together by ____
a. fibronectin b. collagen c. gray matter d. myelin e. tight junctions
Which of the following is an example of Scala Naturae?
a. Minerals rank below plants, plants below animals, animals below humans, and humans below the gods. b. Mosses rank below ferns, ferns below flowering plants, flowering plants below bushes, and bushes below trees. c. Cars rank below buses, buses below trucks, trucks below cars, and buses below airplanes. d. Blood cells rank below blood liquid, blood liquid below lymph, lymph below connective tissue, and connective tissue below skin
The major histocompatibility complex (MHC) is an example of a(n)
A) glycoprotein. B) polysaccharide. C) phospholipid. D) organelle.