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

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