• Biology - Section 1
11. 

Most fish do not sink in water because of the presence of

  1. swim bladder
  2. air bladder
  3. air sacs
  4. air in spongy bones

A. I and II are correct
B. II and III are correct
C. III and IV are correct
D. I, II, III and IV are correct

12. 

Plants synthesis protein from

A. starch
B. sugar
C. amino acids
D. fatty acids

13. 

Plants absorb most part of water needed by them through their

A. embryonic zone
B. growing point
C. root hairs
D. zone of elongation

14. 

Photo-oxidation is

A. photorespiration
B. photolysis
C. light and oxygen induced breakdown
D. All of the above

15. 

Process of cell division can take place by

A. heterosis
B. fusion
C. mitosis
D. None of these