Commonly used method for enumeration of soil microbial population is:A.B.C.D.
A. Contact slide technique
B. Dilution plate technique
C. Microscopic count
D. Microbial respiration
Dehydrogenase is an endoenzyme
C. Don’t know
Rhizospheres affect microbial population and nutrient availability by:
A. Exerting physical pressure
B. Increasing pore space
C. Secreting nutritive metabolites and organic solvents
D. Changing soil structure
How many tiger reserves are present in Karnataka
Antagonistic substances released by microorganisms in the rhizosphere may allow plants to enter ………………. relationship with other plants.
Biofertilizer is a:
A. Mixture of organic matter and microorganism
B. Culture having the desired strain of microorganisms
C. Mixture of inorganic fertilizer and microorganism
D. Decomposed compost enriched with mineral solubilising bacteria
Phosphates enzyme play a major role in ______ of organic phosphates in soil:
D. None of these
Taj Mahal is threatened due to
A. Sulphur dioxide
B. Carbon dioxide
C. Carbon monoxide
D. Water vapour
The green plants are called
D. None of these
Which of these play a very important role in causing rain fall
Which of these activities is eco-friendly?
A. Cars for transportation
B. Polybags for shopping
C. Windmills for generating power
D. Dyes for colouring clothes
———-is the obligatory interaction.
The two components of a ecosystem are
A. Plants and animals
B. Biotic and Abiotic
C. Plants and light
D. Weeds and micro-organisms
Skin microflora is an example of which relationship
The word Environment is derived from
A. When populations are in their favourable environment
B. In habitats with high population density
C. When organisms are in their growing stage.
D. Between microbial populations in a community with extremely different metabolic characteristics.
A. Soil animals
B. Soil plants
C. Soil enzymes
D. None of the above
E. All of the above
Which energy source pollutes the environment?
The ultimate source of energy in an ecosystem is the
In Lichen, the fungle partener is called as————- a) . b) . c) . c) .
D. All of above
Rhizohium culture is used to increase biological nitrogen fixation in….
A. Cereals crops
B. Pulse crops
A. More floods
B. Reduced rainfall
C. Soil erosion
D. All the above
Match the following Picture (representation) to the Correct Symbiotic Relationship by drawing a line from the word to the picture that matches the relationship
A. A-A, B-A,C-B
B. A-B, B-C,C-C
C. A-C, B-B, C-A
D. A-C, B-B, C-C
The presence of autotrophic mycorrhiza enhances the uptake of nutrients in general, but particularly of:
Rhizosphere refers to the small area:
A. Around the root
B. Near the primary root
C. On the root
D. All of the above
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