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IUDs which are used by females :...

IUDs which are used by females :

A

act as spermicidal jellies.

B

block the entry of sperms into vagina.

C

are implanted uder the skin and they release progesterone and estrogen.

D

release coppr ions in the uterus that increase phagocytosis of sperm

Text Solution

Verified by Experts

The correct Answer is:
D
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  17. (A) : Cleistogamous flowers are ususally self pollinated. (R) : Thes...

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  18. (A) : All graminaceous flowers are always wing pollinated. (R) : The...

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  19. (A) : Insect visit flowers to collect honey. (R): Attraction of flow...

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