a) Internal fertilisation occurs
(i) in female body.
b) A tadpole develops into an adult frog by the process of
c) The number of nuclei present in a zygote is
a) Internal fertilization is the fusion of an egg/ova and sperm cell during sexual reproduction inside the female body.
b) Metamorphosis is a biological process which involves sudden and abrupt changes in the body structure of the animal by growth using cell division and differentiation.
c) Though zygote is a single cell, but it has two nuclei as it contain one nuclei from the sperm and one nuclei from the egg/ova.