C:-Micro nutrients
D:-None of these
Correct Answer:- Option-A
Question88:-Application of plant cell and tissue culture in forest management is
A:-Production of disease free plants
B:-Production of disease resistant plant
C:-Micro propagation
D:-Alll of these
Correct Answer:- Option-D
Question89:-Which of the following is a persistent pesticide?
A:-Carbamate
B:-Biopesticides
:-Chlorinated hydrocarbons
D:-Organo phosphates
Correct Answer:- Option-C
Question90:-The effect of acid rain on ecosystem depends on
A:-Amount of acid
B:-Kind of acid
C:-Geology of that area
D:-Alll of these
Correct Answer:- Option-D
Question91:-Tilling and planting at right angle to the slope of the land is called
A:-Strip farming
-Contour cultivation
C:-Crop rotation
D:-Terracing
Correct Answer:- Option-B
Question92:-Significance of biogeochemical cycle is
A:-Resource utilization
-Resource depletion
C:-Biomagnification
D:-None of these
Correct Answer:- Option-A
Question93:-Clean up of the contaminated sites, with the help of natural and genetically modified micro-organisms is called
A:-Bioleaching
-Bioremediation
C:-Phytoremediation
D:-Reclamation
Correct Answer:- Option-B
Question94:-In a closed system growth of microbes is self limiting. Because
A:-Depletion of nutrients
B:-Accumulation of waste
C:-Infection
D:-Both (1) and (2)
Correct Answer:- Option-D
Question95:-Electrical energy is an example of
A:-Low quality energy
B:-High quality energy
C:-Nuclear energy
D:-None of these
Correct Answer:- Option-B
Question96:-India is most affected by
A:-Flood
-Tsunami
C:-Cyclones
D:-Earthquake
Correct Answer:- Option-A
Question97:-Irrigation water quality is determined by the contents of
A:-Salts