Cryopreservation is a technique to preserve substances like pollen grains in liquid nitrogen at temperature

(1) –150 °C

(2) 77.15 K

(3) –210 °C

(4) 110 K

A, B, C, D in the following diagram respectively are:-

(1) Hilum, funicle, inner integument, micropyle

(2) Hilum, funicle, outer integument, micropyle

(3) Funicle, outer integument, nucellus, chalazal pole

(4) Funicle, outer integument, nucellus, micropylar end

Microsporangium is generally surrounded by 4 wall layers. Which of the following 3 wall layers perform the function of protection and help in the dehiscence of anther to release the pollen?

(1) Epidermis, tapetum, endothecium

(2) Epidermis, aril, endothecium

(3) Epidermis, endodermis, mesocarp

(4) Epidermis, middle layer and endothecium

Which of the following points is incorrect about sporopollenin?
(1) It is one of the most resistant organic material known

(2) It can withstand high temperature and strong acids and alkali

(3) 2 enzymes that degrade sporopollenin are known so far

(4) Pollen grains are well preserved as fossils because of presence of sporopollenin

The above diagram shows some stages in microgametogenesis. Identify A, Band C:
               A                               B                              C
(1) Symmetric spindle        Generative cell           Vegetative cell

(2) Symmetric spindle        Vegetative cell           Generative cell

(3) Asymmetric spindle       Vegetative cell           Generative cell

(4) Asymmetric spindle       Generative cell           Vegetative cell

Which of the following statements is false?
 

2. III and VII      

3. IV and V         

4. VI and VII

The viability of pollen grains depends upon:
(1) Prevailing temperature

(2) Prevailing humidity

(3) Genetic potentiality of the concerned species

(4) All of the above

Which of the following has the least pollen viability?

(1) Cereals like wheat and rice          

(2) Members of Rosaceae

(3) Members of Leguminoseae           

(4) Members of Solanaceae

Match the Column-I with Column-II:
    Column-I                                          Column-II
A. Funicle                                 I. Mass of cells within ovule with more food
B. Hilum                                  II. Basal part of ovule
C. Integument                        III. One or 2 protective layers of ovule
D. Chalaza                              IV. Region where body of ovule fuses with funicle
E. Nucellus                               V. Stalk of ovule
(1) A - I, B - II, C - III, D - IV, E - V           

(2) A - V, B - IV, C - III, D - II, E - I

(3) A - IV, B - II, C - I, D - III, E - V           

(4) A - I, B - III, C - V, D - II, E - IV

Identify A, B, C and D structures shown in above diagram of female gametophyte: