Human activities’ i.e. anthropogenic action are found to enhance evolution. For example, (i) Excessive use of DDT as a fertiliser in crops resulted in evolution of DDT resistant mosquitoes. (ii) Evolution of antibiotic resistant microbes occur due to overuse of antibiotics.
When DDT was used first time, many mosquitoes died, but few survived.
Survived mosquitoes showed resistance to DDT and reproduced in presence of DDT.
Offspring produced by these mosquitoes were also resistant to DDT.
Hence, DDT is not affective on mosquito population today
Anthropogenic action hasten evolution. Explain with the help of suitable example.
Answers
Kulkarni
Human activities’ i.e. anthropogenic action are found to enhance evolution.
For example,
(i) Excessive use of DDT as a fertiliser in crops resulted in evolution of DDT resistant mosquitoes.
(ii) Evolution of antibiotic resistant microbes occur due to overuse of antibiotics.