A) porogamy
B) chalazogamy
C) mesogamy
D) apogamy
Correct Answer: A
Solution :
The pollen tube may enter the ovule by following one of three routes given below : [a] Porogamy-Pollen tube enters the through micropyle, eg, most angiosperm. [b] Mesogamy-Pollen tube enters the ovule through integuments (eg, Cucurbita) or through funiculus (eg, Pistada). [c] Chalazogamy-Pollen tube enters the ovule through chalazal tissues, eg. Casuarina, Beta vulgaris, Juglens regia, etc.
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