Question

3. Puberty is marked by the appearance of secondary sexual
4. There is no change in the life cycle of butterfly
5. Frog and fish reproduce by internal fertilisation

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Answer 1

Explanation:

Secondary sexual characteristics including breast development appear at puberty in response to unopposed action of estrogens formed extragonadally from testosterone.

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Answer 2

Answer:

1. True
2. false
3. true
4. hope it helped