A) an immature male gametophyte
B) a mature male gametophyte
C) partially developed male gametophyte
D) last stage of male gametophyte
Correct Answer: C
Solution :
[c] Pollen grain is partially developed male gametophyte because the rest of it development is completed on stigma when pollen grains start to germinate and produce pollen tube having two male nuclei.
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