Environment Quiz


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Antagonistic substances released by microorganisms in the rhizosphere may allow plants to enter ………………. relationship with other plants.

A. commensal

B. symbiotic

C. amensal

D. competition


Skin microflora is an example of which relationship

A. parasitism

B. commensalism

C. syntrophism

D. amensalism


Lichen is the symbiotic association of—————-

A. Fungi & Bacteria.

B. Fungi & Algae

C. Algae & Bacteria

D. Protozoa & Virus


Rhizobia infect the host legumes through:

A. Cortex cells

B. Epidermal cells

C. Root hairs

D. All of the above


The presence of autotrophic mycorrhiza enhances the uptake of nutrients in general, but particularly of:

A. Iron

B. Molybdenum

C. Phosphorus

D. Nitrogen


Which energy source pollutes the environment?

A. Solar

B. Wind

C. Hydroelectric

D. Coal


Deforestation causes

A. More floods

B. Reduced rainfall

C. Soil erosion

D. All the above


The ultimate source of energy in an ecosystem is the

A. producers

B. Consumers

C. Sun

D. Decomposers


———is the type of endosymbiosis.

A. Cooperation

B. Commensalisms

C. Mutualism

D. Predation


———-is the obligatory interaction.

A. Mutualism

B. Commensalism

C. Ammensalism

D. Cooperation


Dehydrogenase is an endoenzyme

A. TRUE

B. FALSE

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


The green plants are called

A. Producers

B. Consumers

C. Decomposers

D. None of these


Bioindicators include

A. Soil animals

B. Soil plants

C. Soil enzymes

D. None of the above

E. All of the above


Phosphates enzyme play a major role in ______ of organic phosphates in soil:

A. Mineralization

B. Adsorption

C. Immobilization

D. None of these


Rhizohium culture is used to increase biological nitrogen fixation in….

A. Cereals crops

B. Pulse crops

C. Cotton

D. Oilseeds


Taj Mahal is threatened due to

A. Sulphur dioxide

B. Carbon dioxide

C. Carbon monoxide

D. Water vapour


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


The fungal mycelium in Mycorrhizae penetrates the root cells by means of projections called———

A. Hausteria

B. Arbuscules

C. Absorbing organ

D. None


How many tiger reserves are present in Karnataka

A. 50

B. 27

C. 8

D. 6


What is the full form of BOD?

A. Bactorial oxygen demand

B. Biological oxygen demand

C. Biological oxide demand

D. None of these


Oxidation of sulfure to sulphate is carried out by:A.B.C.D.

A. Aspergillus spp

B. Azotobacter spp

C. Bacillus spp

D. Thiobacillus spp


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


What are considered as bioindicators of air pollution

A. Mycorrhizae

B. Lichens

C. Rhizosphere

D. None of the above


Which of the following relationships identifies a situation in which two species share a requirement for a limited resource thus reducing the fitness of one or both species? A

A. Parasitism

B. Competition

C. Decomposition

D. Mutualism




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