Question

Choose the most appropriate answer.
(a) Internal fertilization occurs
(i) in female body.
(ii) outside female body.
(iii) in male body.
(iv) outside male body.

(b) A tadpole develops into an adult frog by the process of
(i) fertilization (ii) metamorphosis (iii) embedding (iv) budding

(c) The number of nuclei present in a zygote is
(i) none (ii) one (iii) two (iv) four

Answer 1

(a) Internal fertilization is a type of sexual fertilization. It is the union of an egg cell with a sperm during sexual reproduction inside the body of a female. For this process, male sperms are required to enter into the female reproductive system.

(b) Metamorphosis is a biological process of physical change in an animal after its growth.
(c) A zygote is a fertilized egg formed after the union of male and female gamete. It has two nuclei contributed each by male and female gamete.