What happened to the rate of mutations that cause DDT- resistance over this time period?
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a) Graph the data in the table below. b) After graphing, hypothesize why the percentage of mosquitoes rose rapidly. c)suggest an explanation for the global spread of DDT resistance Mosquito Resistance to DDT Month 0 8 12 Mosquitoes Resistant* to DDT 4% 45% 77% Data from C. F. Curtis et al., Selection for and against insecticide resistance and possible methods of inhibiting the evolution of resistance in mosquitoes, Ecological Entomology 3:273–287 (1978). *Mosquitoes were considered resistant if they were not killed within 1 hour of receiving a dose of 4% DDT.
Sri K.
Mosquitoes resistant to the pesticide DDT first appeared in India in 1959 but are now found throughout the world. The table below shows the spread of mosquitoes resistant to DDT. Based on what you have learned, why do you think the percentage of mosquitoes resistant to DDT rose so rapidly? Answers: DDT caused mutations in the mosquito populations, thus a resistant population evolved Because the mosquitoes were exposed to DDT, this caused a selection of the mosquito population that was resistant to DDT Mosquitoes exchanged genes with bacteria and thus became resistant to DDT It is a random process and therefore cannot be explained properly
Evelyn M.
SCIENTIFIC INQUIRY $\bullet$ DRAW IT Mosquitoes resistant to the pesticide DDT first appeared in India in $1959,$ but now are found throughout the world. (a) Graph the data in the table below. (b) Examine the graph, then hypothesize why the percentage of mosquitoes resistant to DDT rose rapidly. (c) Suggest an explanation for the global spread of DDT resistance.
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