Biology, 21.02.2020 22:53 elicollierec
The fruit fly Drosophila melanogaster has an allele that confers resistance to DDT and similar insecticides. Laboratory strains of D. melanogaster have been established from flies collected in the wild in the 1930s (before the widespread use of insecticides) and the 1960s (after 20 years of DDT use). Lab strains established in the 1930s have no alleles for DDT resistance. In lab strains established in the 1960s, the frequency of the DDT-resistance allele is 37%. Which statement is correct?a. Alleles for DDT resistance arose by mutation during the period of DDT use because of selection for pesticide resistance.
b. The evolutionary fitness associated with the heritable trait of DDT resistance changed once DDT use became widespread.
c. Resistance to DDT evolved in some fruit flies in order to allow them to survive.
Answers: 1
Biology, 22.06.2019 07:00, jedmnlp5xuks
Time remaini 02: 50: 5 in the farewell speech, queen elizabeth's use of first-person point of view her to appear to be impartial and objective prevents her from addressing the audience directly allows her to share her personal thoughts and ideas, makes it seem as though she's observing from the outside, mack this and return save and evit
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Biology, 22.06.2019 10:00, FailingstudentXD
Dna and rna share a number of similarities, but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna
Answers: 1
The fruit fly Drosophila melanogaster has an allele that confers resistance to DDT and similar insec...
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