The central cell in the embryo sac, after triple fusion, becomes:

(1) Primary endosperm cell

(2) Endosperm

(3) Embryo

(4) Zygote

The endosperm is completely consumed by the developing embryo in all of the following except:

(1) Pea

(2) Groundnut

(3) Beans

(4) Castor

Epicotyl has a shoot apex and a few leaf primordial enclosed in a hollow foliar structure called as the:

(1) Coleoptile

(2) Coleorhiza

(3) Scutellum

(4) Perisperm

The micropyle remains as a small pore in the seed coat. During germination, this facilitates entry of:

I. Oxygen

II. Water

(1) Only I

(2) Only II

(3) Both I and II

(4) Neither I nor II

Genetic self-incompatibility tends to increase

(1) pollen dispersal

(2) inbreeding

(3) pollination

(4) outcrossing

A fertilized embryo sac of an angiosperm contains:

I. Haploid cells

II. Diploid cells

III. Triploid cells

(1) I and II only

(2) I and II only

(3) II and III only

(4) I, II and III

The embryo of a grass seed is enclosed by two protective sheaths, a(n) _________, which covers the young shoot, and a(n) __________, which covers the young root.

(1) plumule; radical

(2) hypocotyl; picotyls

(3) coleoptile; coleorhiza

(4) scutellum; replum

The intine of the pollen grain is a:

1. Thick and discontinuous layer made of sporopollenin

2. Thick and continuous layer made of sporopollenin

3. Thin and discontinuous layer made of cellulose and pectin

4. Thin and continuous layer made of cellulose and pectin

In the monosporic embryo sac of a flowering plant, the number of nuclei that get surrounded by cell walls and thus are organized into cells is:

1. 5

2. 6

3. 7

4. 8

Female flowers remain submerged in water and the pollen grains are released inside the water in:

1. Sea grasses

2. Vallisneria

3. Water lily

4. Water hyacinth