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Answer: 4) Estrogen and progesterone.
5)
1) Testis, in males, are used in production of sperms and the hormone, testosterone.
2) Sporangium, in certain plants, help in asexual reproduction.
3) All the petals of a flower is called corolla. Therefore, corolla helps in attracting insects for pollination.
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The fusion of egg with the sperm is called fertilisation
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