The layers in the walls of the microsporangium that helps in the dehiscence of anther to release the pollen include:

I:	Epidermis
II:	Endothecium
III:	Middle layers
IV:	Tapetum

1.	I and II only	2.	I, II, and III only
3.	II and III only	4.	I, II, III, and IV

 A typical anther shows

a. Two lobes with two theca each
b. Each lobe as dithecous
c. All cells in a given microsporangium as potential PMC
d. Thousands of microspores per microsporangium

Out of these statements :

1. b is incorrect
2. a and b are correct
3. c and d are incorrect
4. a, b, c and d are correct

Which one of the following statement is false in respect of flowering plants?

1. Parthenocarpy can be induced through the application of growth hormones
2. Integuments encircle the ovule except at the tip where a small opening called the germ pore is organized
3. Endosperm development precedes embryo development
4. Apomicts have several advantages in horticulture and agriculture

Megaspore mother cell differentiates from

1. Nucellus in the micropylar region.

2. Nucellus in the chalazal region.

3. Primary parietal cell in chalazal region.

4. Integument cell in micropylar region.

In a stamen proximal end of filament is attached to

1. Anther.

2. Thalamus or petals.

3. Sepals.

4. Gynoecium.

Choose the correct statements
a. Perisperm is the persistant nucellus in the seeds of black pepper.
b. Single large cotyledon in grass is situated towards lateral side of the embryonal axis.
c. Seeds are the basis of agriculture.
d. Citrus has only one embryo in a seed.

1. Only a

2. Only a & b

3. Only a, b & c

4. a, b, c & d

Which of the following has proved helpful in preserving pollens as fossils?

Pollen grains can be stored for several years in liquid nitrogen having a temperature of:

Double fertilization is exhibited by: