Double fertilization is:

1.	Fusion of two male gametes of a pollen tube with two different eggs
2.	Fusion of one male gamete with two polar nuclei
3.	Fusion of two male gametes with one egg
4.	Syngamy and triple fusion

In the majority of angiosperms:

Pollination in water hyacinth and water lily is brought about by the agency of:

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?

The ovule of an angiosperm is technically equivalent to:

1. megasporangium

2. megasporophyll

3. megaspore mother cell

4. megaspore

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:

1. Bee

2. Wind

3. Bat

4. Water

A dioecious flowering plant prevents both:

1. Autogamy and geitonogamy

2. Geitonogamy and xenogamy

3. Cleistogamy and xenogamy

4. Autogamy and xenogamy

Double fertilization is exhibited by:

1. Algae

2. Fungi

3. Angiosperms

4. Gymnosperms