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1. If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize \(10\) ovules?
 
The number of pollen grains needed to fertilize \(10\) ovules is:
 
2. In which part of the flower germination of pollen grains takes place?
 
The part where flower germination of pollen grains take place is:
 
3. Name two organisms which reproduce through budding.
 
Organisms which reproduce through budding:
 
4. Mention the function of endosperm.
 
The function of endosperm is:
 
5. Name the hormone responsible for the vigorous contractions of the uterine muscles.
 
The hormone responsible for the vigorous contractions of the uterine muscles is: