A) porogamy
B) misogamy
C) anisogamy
D) chalazogamy
Correct Answer: A
Solution :
After reaching ovary, the pollen tube enters in the ovule. For this purpose, pollen tube can follow one of the following three routes Porogamy-Pollen tube enters in the ovule through micropyle. It occurs in mostly angiosperms. Mesogamy-Pollen tube enters through integuments (Cucurbita) or through funiculus (Pistacia). Chalazogamy-Pollen tube enters through chalazal tissues, eg, Casuarina, Beta vulgaris, Pterocarya, Ostrya, Jaglans regia.
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