When anther is young a group of compactly arranged homogenous cells are present in centre it is known as

(1) Sporogenous tissue

(2) Potential pollen mother cell

(3) Both 1 and 2                

(4) Conjunctive tissue

 

Which of the following structure is not associated with protection and dehiscence of anther?

1. Tapetum                     2. Epidermis
2. Endothecium               4. Middle layer

Which of the following statement is not correct for pollen grain?

Look at the diagram given below and answer appropriately

(i) Since ___A___ is associated with fruit, it is called as ___(i)___ .
(ii) Since ___B___ is present, fruit cannot be called as ___(ii)___ .

1. A - Pericarp, (i) - True fruits
2. B - Seed, (ii) - Ex-albuminous
3. A - Thalamus, (i) - True fruit
4. B - Seed, (ii) - Parthenocarpic

 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

Find correct match

Arrange the following stages of microspore development into pollen grain, in correct sequence

1. b, c, d, and a 

2. b, d, a and c

3. a, c, b and d 

4. b, a, d and c

Identify the statements that are true for anemophilous flowers

     a.  Pollen grains are light and non-sticky.
     b.  They possess well exposed stamens.
     c.  They have large coloured flowers.
     d.  They have single ovule in each ovary.
     e.  Flowers produce nectar and scent.

1.  a, b and e

2.  a, b and d

3.  b, c and e

4.  c, d and e

Choose the incorrect statement with respect to pollen grain

1. Exine of the pollen grain has prominent apertures called germ pores where sporopollenin is absent.

2. Inner wall of the pollen grain is called intine.

3. Pollen grains are generally spherical in shape.

4. In 60 percent of angiosperms, pollen is shed at three-celled stage.

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