The embryo sac of an angiosperm at maturity is:

Double fertilization involves:

Pollen grain germinates on the:

Endosperm is:

Megasporogenesis produces:

The micropyle allows entry of:

Self-incompatibility prevents:

Tapetum in anthers:

Sporopollenin is:

Emasculation is the removal of:

The suspensor in angiosperm embryo:

Polyembryony means:

Entomophilous flowers are pollinated by:

The structure that develops into seed after fertilization is:

Apomixis is:

In angiosperms, microspore mother cells undergo meiosis to produce:

Parthenocarpic fruits are:

Filiform apparatus is found in:

Cleistogamous flowers ensure:

Pollen bank is used for: