Biology Part II Chapter 18 Full Test

Biology Part II Chapter 18 Full Test
Name : Subject :  Biology -II Total Marks:  50    
 Course :     CHAPTER 18 (T4) Date :   22/01/2020 Ob. Marks:  
  
Q.1: Tick right option:(1x10=10)
  1. Photoperiod affects flowering when shoot meristems start producing:
    1. Lateral buds
    2. Floral buds
    3. Leaves
    4. branches
  2. Low-temperature treatment given to plants stimulates the production of vernalin which is actually the _ _ _ _ _.
    1. auxin
    2. gibberellin
    3. cytokinins
    4. ethene
  3. An example of an egg-laying mammal is:
    1. kangaroo
    2. Duckbill
    3. platypus
    4. rat
    5. squirrel
  4. The duration of the gestation period in human females is usually?
    1. 270 days
    2. 330 days
    3. 380 days
    4. 290 days
  5. The ovary under the stimulus of FSH also produces a hormone i.e
    1. progesterone
    2. estrogen
    3. oxytocin
    4. corticosteroids
  6. In plants elongation of cells is favored by which light.
    1. infrared
    2. red
    3. blue
    4. ultraviolet
  7. Plant hormone florigen is produced in:
    1. root
    2. stem
    3. leaves
    4. flowers
  8. All of the following are short-day plants except
    1. Soya bean
    2. tobacco
    3. tomato
    4. strawberry
  9. One of the following is not a method of asexual reproduction
    1. sporulation
    2. gametogenesis
    3. apomixes
    4. parthenogenesis
  10. Which one is diploid in nature?
    1. megaspore
    2. Male prothallus
    3. Microspore mother cell
    4. Female prothallus  
Q.No.2. Out of following short questions,   (12×2=24)
  • What are the advantages of photoperiodism and vernalisation?
  • Explain the disease gonorrhea.
  • How the oestrous cycle is different from the menstrual cycle?
  • What are phytochromes?
  • What is the difference between oogenesis and spermatogenesis in humans?
  • What is climacteric & also gives its role?
  • What is the ovoviviparous condition?
  • What is haploid parthenogenesis?
  • What are apomixes?
  • What is the luteal phase?
  • Attempt  these questions (8×2=16)
 Q# 3:  (a) Explain the role of phytochromes in photoperiodism.            (4)
            (b) Explain the female reproductive cycle. (4)

Q# 4:    (a) Define cloning. Write its significance and drawbacks.   (4)
             (b) Give a comprehensive comparison between sexual and asexual reproduction.  (4)