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Phospholipids can _______________ the vesicles which allows for faster growth, larger protocells and efficient division
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- 34. "Natural selection decreases genetic variability in a population." This statement is:A) always true.B) never true.C) sometimes true, especially in cases of stabilizing selection.D) sometimes true, especially in cases of disruptive selection.E) sometimes true, especially in cases of frequency-dependent selection.
- 17. Many mosquito populations today are resistant to pesticides that were historically effective. This pesticideresistance arose in these populations because:A) the pesticides caused mutations in the DNA of mosquitoes that conferred resistance phenotypes, and these werepassed on to subsequent generations.B) some individuals were resistant to the pesticides before they were used, and those mosquitoes were more likelyto survive and reproduce.C) populations had to develop tolerance in order to survive.D) individual mosquitoes built up immunity to the pesticides after exposure.E) mosquitoes from surrounding areas came into the pesticide area.
- 20. Artificial selection was used on corn to produce a single strain of corn with increased growth rates and greaterresistance to a fungus. Although farmers have continued to select for these traits, the productivity of this strain is nolonger increasing. This suggests that:A) the population size has been decreasing.B) artificial selection is not as strong as natural selection.C) the corn population has been weakened by artificial selection.D) all or most of the natural variation for these traits has been eliminated.E) long-term disruptive selection may lead to speciation.