1.

DDT was sprayed on some insects as an experiment. Among them some died and some 3 survived A second generation was created by mating the survived ones. Again DDT sprayed. This process was repeated on five generations. The result is given in the table. Analyze it arid answer the following questions.GenerationsPercentage of survived insects110220330440550a) Interpret the result given in the table. b) What scientific explanation can you give for this result? c) What may be the result if the experiment is continued?

Answer»

a) After each generation’s resistance to DDT increases, ie. variation increases.

b) It is an example for Darwin’s theory of Natural selection. Due to struggle existence variations will arises and transmitted into next generations.

c) The total population becomes resistant to DDT / Evolution of DDT resistant species.



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