Environment Quiz


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



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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