A typical angiosperm embryo sac at maturity is:

1. 7-nucleate and 7-celled

2. 8-nucleate and 8-celled

3. 8-nucleate and 7-celled

4. 7-nucleate and 8-celled

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

1. Poaceae; Solanaceae

2. Rosaceae; Leguminosae

3. Poaceae; Rosaceae

4. Poaceae; Leguminosae

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma, is:

In grasses what happens in micro spore mother cell for the formation of mature pollen grains : -
1.  One meiotic and two mitotic divisions
2.  One meiotic & one mitotic divisions
3.  One meiotic division
4.  One mitotic division

Anemophilly type of pollination is found in
1.  Salvia
2.  Bottle brush
3.  Vallisneria
4.  Coconut

In a flowering plant, archesporium gives rise to : -

(1 ) Only the wall of the sporangium

(2) Both wall and the sporogenous cells

(3) Wall and the tapetum

(4) Only tapetum and sporogenous cells

What is the direction of micropyle in anatropous ovule :-

1. Upward

2. Downward

3. Right

4. Left

In Angiosperms, pollen tubes liberate their male gametes into the

1. Central cell

2. Antipodal cells

3. Egg cell

4. Synergids

Hair found in the inflorescences of Zea mays is the modification of:

Endosperm is formed during double fertilization by

1. Two polar nuclei & one male gamete

2. One polar nuclei & one male gamete

3. Ovum and male gamete

4. Two polar nuclei & two male gametes