Evolution Question 3
3. Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
[2020]
(a) Darwin’s Finches of Galapagos islands.
(b) Herbicide resistant weeds.
(c) Drug resistant eukaryotes.
(d) Man-created breeds of domesticated animals like dogs.
(a) (a) and (c)
(b) (b),
(c) and (d)
(c) only
(d)
(d) only (a)
Show Answer
Answer : b
Hints & Solution
(b) The correct option is (b) because herbicide resistant weeds, drug resistant eukaryotes and man-created breeds of domesticated animals like dogs are examples of evolution by anthropogenic action. Darwin’s Finches of Galapagos islands are example of natural selection, adaptive radiation and founder’s effect. Anthropogenic actions refer to the activities that are caused by human beings. The human activities like excessive use of herbicides, pesticides have resulted in the evolution and selection of only resistant varieties of pests.
