Every question from past board papers on Mechanism: variation, mutation, recombination, natural selection, newest paper first. Open any question for its full worked answer.
Given below are two statements:
Statement I: RNA mutates at a faster rate.
Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.
In the light of the above statements, choose the correct answer from the options given below:
Which one of the following is NOT an advantage of inbreeding?
Natural selection where more individuals acquire specific character value other than the mean character value, leads to :
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action ?
(a) Darwin's Finches of Galapagos islands.
(b) Herbicide resistant weeds.
(c) Drug resistant eukaryotes.
(d) Man-created breeds of domesticated animals like dogs.
By which method was a new breed 'Hisardale' of sheep formed by using Bikaneri ewes and Marino rams ?
Select the incorrect statement.
According to Hugo de Vries, the mechanism of evolution is
Homozygous purelines in cattle can be obtained by :
Artificial selection to obtain cows yielding higher milk output represents :
