1.  acidity

2.  aridity

3.  metal toxicity

2.  pyrenoid

3.  stroma

4.  both (1) and (3)

2.  wheat, maize and sorghum

3.  rice, maize and sorghum

4.  wheat, rice and barley

2.  cytosol

3.  chloroplast genome

4.  nuclear genome

1.  Lipase

2.  Exonuclease

4.  Protease

2.  Yellow revolution

3.  White revolution

4.  Blue revolution

1.  lymphocytes

3.  platelets

4.  leucocytes

2.  Chrysanthemum and Agave

3.  Agave and Kalanchoe

4.  Asparagus and Bryophyllum

1.  Vulnerable species

2.  Critically endangered species

3.  Extinct species

1.  Fibrinogen

2.  Prothrombin

3.  Heparin