Excretion of water through special pores present at the margin of leaves is called:
- (A) Evaporation
- (B) Guttation
- (C) Transpiration
- (D) Sublimation
- (B) Guttation
The process of guttation occurs in the plant:
- (A) Pine
- (B) Grass
- (C) Keekar
- (D) Rubber
- (B) Grass
Plants store large amount of water in their cells for:
- (A) Transpiration
- (B) Guttation
- (C) Turgidity
- (D) Photosynthesis
- (C) Turgidity
Blight _______ the distance of potato can be cured by:
- (A) Diathane
- (B) Bordeaux mixture
- (C) Dionine T-4
- (D) Agrimycine
- (B) Bordeaux mixture
The gas produced in mesophyll cells as by-product during day time is called:
- (A) Oxygen
- (B) Carbon dioxide
- (C) Nitrogen
- (D) Chlorine
- (A) Oxygen
Pollination by birds is called:
- (A) Autogamy
- (B) Ornithophily
- (C) Entomophily
- (D) Anemophily
- (B) Ornithophily
The percentage of water in a typical plant cell is about:
- (A) 50 percent
- (B) 60 percent
- (C) 65 percent
- (D) 85 percent
- (D) 85 percent
Why do ‘Desert plants’ have thorns?
- (A) To save them evaporation of moisture
- (B) It is natural phenomenon
- (C) To avoid absorption of excessive heat
- (D) To discourage their being eaten up by animals
- (D) To discourage their being eaten up by animals
“Khaira” is a plant disease caused due to deficiency of:
- (A) Iron
- (B) Carbon
- (C) Zinc
- (D) Nitrogen
- (C) Zinc
Weedicide used for rice is:
- (A) DDT
- (B) Dalapon
- (C) 2, 4 D
- (D) Urea
- (C) 2, 4 D