NCERT class 12th Biology important question of sexual reproduction in flowering plants


1. Write down the name of A, B, C, D and E

2. Write down the name of A, B, C, and D
 

3. Write down the name of Part A, B, C, D, E and F

 
 

4. Write down the name of  Part A, B, C and D


 

 
5. Write down the name of labelled Structure 'A'

 

FILL IN THE BLANKS 
6 . The microsporangium develop further and become____
Pollen sac 

7 . The innermost wall layer of microsporangium is the____
Tapetum 

8 . In the centre of each microsporangium a compact arragned tissue is 
Sporogenous tissue 

9 . The two part of a typical the long and slender stalk called and the terminal generally bilobed structure called
Stamen , Filament , anther 

10 . A typical angiosperm anther is_____with each lobe having two theca i.e. they are called_____
Bilobed , dithecous 

11 . The hard outer layer of pollen grain , called exine is made up of 
Sporopollenin 

TRUE AND FALSE 

12 . . In pollen grain exine has prominent apertures called germ pores where sporopollenin is absent . 
True 

13 . The inner wall of pollen grain is called intine . 
True 

14 . In microsporogenesis , PMC undergo mitosis and form pollen grains . 
False 

15 . Pollen grains can be stored in liquid nitrogen at - 196 ° C . 
True 

16 . Wheat and rice pollen grains has long pollen viability 
False 

17 . Match the following :- 

 

 Column-A 

 Column-B

 1.

Proximal part of filament

a. Tapetum

 2.

Inner most wall layers of pollen sac

b. attached to the thalamus

 3.

Sporo - pollenin

c. most resistant material

 4.

Ploidy of the cells of the tetrad

d. Haploid


1-b , 2 - a , 3 - C , 4 - d 


18 . . In a mature pollen , how many nuclei are present and write their name also . 
2 - nucleus , 1 - vegetative nucleus 1 - generative nucleus 


19 . . Name any plant that causes pollen allergy 
Parthenium

20. What is the role of pollen tablets in anthletes and race horses
Increase performance 

21. Where is the use of pollen Bank.
Crop breeding programmes

22. What is the diameter of pollen grain
25-50 micrometer 

23. Following figures showing pistil PISTIL-A, B, C & D

Answer 

24. Identify A, B, C, D, E, F, G, H and I

Answer

25. Identify A, B, C, D, E,  F and G

Fill in the Blank 
26. The basal part of the carpel is____
Overy

27. Services as a landing platform for pollen grain_____
Stigma

28. The mitotic divisions which occur during embryo sac from megaspore are___
Strictly free number

Post a Comment

Please comment us your comment enhances our Energy level.

Previous Post Next Post