Choose the correct statement from the following:

1.	Cleistogamous flowers always exhibit autogamy
2.	Chasmogamous flowers always exhibit geitonogamy
3.	Cleistogamous flowers exhibit both autogamy and geitonogamy
4.	Chasmogamous flowers never exhibit autogamy

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant?
1. Bagging of the female flower
2. Dusting of pollen on the stigma
3. Emasculation
4. Collection of pollen

The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:

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

Pollen grains lose viability within 30 minutes of their release in some members of:

The majority of water plants like water hyacinth and water lily are pollinated by:

At what temperature pollens can be stored for years in liquid nitrogen?

In angiosperms, the mature female gametophyte is represented by:

A typical angiosperm embryosac, at maturity, is: