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)

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Solution

(a) (i) and (ii)

Speciation is the evolutionary process by which new biological species arise. Speciation involves changes in chromosome number and/or molecular changes in DNA of an embryo which is a more common phenomenon.

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Similar questions

Q. 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)

Q. 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.

Q. New species may be formed if DNA in germs cells undergoes significant changes or chromosome number changes in the gametes.

Q. Question 6
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal

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

Question 4

Which of the following is/are true when milk changes into curd?

(i) Its state is changed from liquids to semi-solid.
(ii) It changes colour.
(iii) It changes taste.
(iv) The change cannot be reversed.

Choose the correct option from below :
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i), (iii) and (iv)
(d) (i) to (iv)

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Taxonomy

Standard IX Biology

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(a) (i) and (ii) Speciation is the evolutionary process by which new biological species arise. Speciation involves changes in chromosome number and/or molecular changes in DNA of an embryo which is a more common phenomenon.

(a) (i) and (ii)

Speciation is the evolutionary process by which new biological species arise. Speciation involves changes in chromosome number and/or molecular changes in DNA of an embryo which is a more common phenomenon.