Question

In the given diagram of an angiosperm ovule, name the type of entry of pollen tube into ovule.

Options

• Porogamy

• Mesogamy

• Chalazogamy

• Xenogamy

Answer 1

Mesogamy

Explanation:

In the diagram, the pollen tube is shown entering the ovule by piercing through the integuments (the protective layers) rather than through the micropyle or chalaza. This specific mode of entry is termed mesogamy and is commonly seen in plants like Cucurbita.