B_T_2015_02_

29. (c) 30. (c) 31. (d) 32. (c) 33. (b)


30. (c) 35. (b) 36. (b) 37. (b) 38. (b)


31. A - Whip or tongue grafting

B - Wedge grafting
C - Air layering
D - Micropropagation

E - Approach grafting
F - Crown grafting

40. (a) (i) A; (b) (ii) D; (c) (iii) B; (d) (iv) F; (e) (v) C; (f) (vi) E.

CHAPTER 2 : sExuAl REPRoDuCTIon In FlowERIng
PlAnTs

1. 
   

   (c) 2. (d) 3. (d) 4. (b) 5. (b)

   
   


2. 
   

   (d) 7. (d) 8. (c) 9. (b) 10. (a)

   
   


3. 
   

   (d) 12. (d) 13. (a) 14. (d) 15. (b)

   
   


4. 
   

   False. They are shed at 2 celled stage.

   
   


5. 
   

   False. Sporopollenin is absent at germ pores.

   
   


6. 
   

   False. It is 8 nucleate and 7 celled at maturity.

   
   


7. 
   

   True

   
   


8. 
   

   True

   
   


9. 
   

   False. It is a type of asexual reproduction.

   
   


10. 
    

    True

    
    


11. 
    

    True

    
    


12. 
    

    False. Coconut water is free-nuclear endosperm
    (made up of thousands of nuclei) and surrounding
    white kernel is cellular endosperm.
    25. True
    26. A-(vii), B-(i), C-(ii), D-(iii), E-(vi), F-(v), G-(iv)
    27. A-(viii, xiv), B-(i, xiii), C-(ii, vii), D-(iii, xii), E-(iv, xi),
    F-(v, x), G-(vi, ix)
    28.(A) (i) angiosperms (ii) Nawaschin (iii) Fritillaria
    (iv) Lilium (v) generative (vi) vegetative
    (B) (a) Epihydrophily Hypohydrophily occurs below the
    surface of water, while hypohydrophily epihydrophily
    occurs over the surface of water.
    (b) Pollen tube travels chemotropically along the
    concentration gradient of potassium calcium -
    nitrogen boron - thiamine inositol complex.
    29. (c) 30. (a) 31. (b) 32. (b) 33. (b)
    34. (b) 35. (a) 36. (a) 37. (a) 38. (a)
    39. A -Orthotropous ovule
    B - Anatropous ovule
    C - Hemitropous ovule
    D - Campylotropous ovule
    E - Amphitropous ovule
    F - Circinotropous ovule
    40. (a) (i) B; (b) (ii) B, (iii) funiculus; (iv) raphe; (c) (v) C;
    (d) (vi) F; (e) (vii) A

    
    

CHAPTER 3 : HuMAn REPRoDuCTIon

1. (d) 2. (c) 3. (d) 4. (c) 5. (d)


2. (b) 7. (c) 8. (a) 9. (d) 10. (d)


3. (a) 12. (b) 13. (d) 14. (d) 15. (a)


4. True


5. True


6. False. They descend into scrotum, before birth, during
   the 7th month of fetal development.


7. True


8. False. It consists of fructose only.


9. True


10. True


11. False. It begins after 7 days of fertilisation and it
    takes three days for the process to be completed.


12. True


13. False. Organogenesis begins during the first month
    of pregnancy.


14. A-(vii), B-(i), C-(ii), D-(vi), E-(iii), F-(v), G-(iv)


15. A-(v, ix), B-(vi, xi), C-(vii, x), D-(i, xiv), E-(iv, viii),
    F-(iii, xii), G-(ii, xiii)