(a) Internal fertilization occurs – (i) in the female body.
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) A tadpole develops into an adult frog by the process of – (ii) metamorphosis.
Metamorphosis is a biological process of physical change in an animal after its growth.
(c) The number of nuclei present in a zygote is – (ii) one.
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