Question

Differentiate between mesogamy and porogamy.

Answer 1

	Mesogamy	Porogamy
1.	Mesogamy is the type of fertilization in which the pollen tube enters the ovule through the integuments or middle part of the ovule.	Porogamy is the type of fertilization in which the pollen tube enters the ovule through the micropyle.
2.	The pollen tube enters through the middle part of the ovule (integuments or funiculus).	The pollen tube enters through the micropyle (micropylar end).
3.	It occurs in plants such as cucurbits.	It occurs in most angiosperms, such as lily and sunflower.
4.	The pollen tube penetrates laterally into the embryo sac.	The pollen tube penetrates directly through the micropyle into the embryo sac.
5.	It is less common in flowering plants.	It is less common in flowering plants.