Primary endosperm nucleus (PEN) is formed by the fusion of

1. 2 polar nuclei + 1 synergid cell nucleus

2. 1 polar nucleus + 1 antipodal cell nucleus + 1 synergid cell nucleus

3. 2 polar nuclei + 1 male gamete nucleus

4. 2 antipodal cell nuclei + 1 male gamete nucleus

Match column I with column II and select the correct option from the given codes.

1. A - (iv), B - (ii), C - (iii), D - (i)

2. A - (iii), B - (ii), C - (i), D - (iv)

3. A - (i), B - (iv), C - (iii), D - (ii)

4. A - (ii), B - (iii), C - (i), D - (iv)

The following is the diagram of T.S. of anther. Identify the parts labelled A, B and C.

Select the option that contains all plants which produce non-endospermic seeds.

(1) Gram, Pea, Bean, Groundnut

(2) Castor, Peanut, Orchid, Wheat

(3) Coconut, Walnut, Wheat, Gram

(4) Castor, Maize, Coconu, Orchid

Pollination in Rafflesia is occurred by

a.   carrion flies

b.   elephant

c.   bat

d.   crow

Censar mechanism of seed dispersal is found in

(1) Papaveraceae

(2) Liliaceae

(3) Leguminosae

(4) Rosaceae

Which one of the most common embryo sac in flowering plant?

(1) Monosporic, 8 nucleated and 7 celled

(2) Monosporic, 7 celled and 7 nucleated

(3) Bisporic, 8 nucleated and 7 celled

(4) Bisporic, 7 celled and 8 nucleated

When a fern plant is developed from its prothallus without fertilisation? This pehnomenon is an example of

(1) parthenocarpy

(2) apogamy

(3) apospory

(4) organogenesis

If a stock has 2n = 48 and scion microspore mother cell has 2n = 24; then root cell and the microspores will have .... chromosomes respectively.

(1) 12, 48

(2) 48, 12

(3) 24, 12

(4) 24, 96

A fertilized egg of a plant has 40 chromosomes. The number of chromosomes present in the microspore mother cell is

(1) 20

(2) 40

(3) 60

(4) 80