Multiple choice The entry of pollen tube into the ovule through micropyle is called porogamy mesogamy anisogamy chalazogamy Reveal answer Fill a bubble to check yourself A Correct answer Explanation Porogamy is the entry of pollen tube through the micropyle, the most common type of pollen tube entry in flowering plants. Mesogamy is through the integuments, chalazogamy is through the chalaza, and anisogamy refers to gametes of different sizes.