Question

10. New species may be formed if

(i) DNA undergoes significant changes in germ cells

(ii) chromosome number changes in the gamete

(iii) there is no change in the genetic material

(iv) mating does not take place

(a) (i) and (ii)
(b) (i) and (iii)

(c) (ii), (iii) and (iv)
(d) (i), (ii) and (iii)

Answer 1

A) (i) and (ii)

I think it will be helpful for u

Answer 2

New species are formed due to geographical isolation, genetic drift and variation so variation is due to change in chromosome number, change of DNA in germ cell and due to change in genetic material.
therefore your answer is (a) 1and 2