Pesticide resistance in insects is due to _________.
a. natural selection
b. disruptive selection
c. the bottleneck effect
d. gene flow
Ans: a. natural selection
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The Intergovernmental Panel on Climate Change reported in 2007 that atmospheric carbon dioxide levels will nearly double by the end of this century. If this happens, what will be the atmospheric concentration of carbon dioxide?
A. 2.0 ppm B. 3.5 ppm C. 385 ppm D. 560 ppm E. 700 ppm
The infinite variety of antibodies that can be generated by B cells is due to
a. the infinite variety of genes in these cells. b. the shuffling of genes to produce an infinite variety of proteins. c. the recombination of genes due to crossing over. d. the infinite variety of genes in these cells and the recombination of genes due to crossing over. e. the infinite variety of genes in these cells, the recombination of genes due to crossing over, and the shuffling of genes to produce an infinite variety of proteins.
When prey populations are controlled by predators in a trophic level above them, they are said to be under ________ control
Fill in the blank(s) with correct word
Please match the description to the correct group of microorganisms. Minute acellular particles that parasitize cells
A) Algae B) Viruses C) Bacteria D) Protozoa E) Fungi F) Helminths