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a. During the past 50 years, more than 200 species of insectsthat attack crop plants have become highly resistant to DDT andother pesticides. Based on what you have learned in this classregarding evolution, explain the rapid and widespread evolution ofresistance. Now that DDT has been banned in the US, what do youexpect to happen to levels of resistance to DDT among insectpopulations?

b.How can you explain the occurrence of birth defects (caused byaltered genes) in children and grandchildren of WWII atomic bombvictims, when the victims themselves were only mildlyaffected?

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Patrina Schowalter
Patrina SchowalterLv2
28 Sep 2019

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