Which one of the following is not a bioindicator of water pollution?
Options
(a) Blood-worms (b) Stone flies (c) Sewage fungus (d) Sludge-worms
Correct Answer:
Stone flies
Explanation:
No explanation available. Be the […]
The slow rate of decomposition of fallen logs in nature is due to their
Options
(a) low moisture content (b) poor nitrogen content (c) anaerobic environment around them (d) low cellulose content
Correct […]
Mass of living matter at a trophic level in an area at any time is called
Options
(a) standing crop (b) deteritus (c) humus (d) standing state
Correct Answer:
standing crop
Explanation:
Standing […]
Which one of the following is a primary consumer in maize field ecosystem?
Options
(a) Lion (b) Grasshopper (c) Wolf (d) Phytoplankton
Correct Answer:
Grasshopper
Explanation:
No explanation available. Be the first to […]
The two gases making highest relative contribution to the greenhouse gases are
Options
(a) CO2 and CH4 (b) CH4 and N2O (c) CFC5 and N2O (d) CO2 and N2O
Correct Answer:
CO2 and […]
The bacterium Bacillus thuringiensis is widely used in contemporary biology as
Options
(a) insecticide (b) agent for production of dairy products (c) source of industrial enzyme (d) indicator of water pollution
Correct Answer: […]
Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?
Options
(a) Sulphur cycle (b) Phosphorus cycle (c) Nitrogen cycle (d) Carbon cycle
Correct Answer:
Phosphorus cycle
Explanation:
No […]
The rate of formation of new organic matter by rabbit in a grassland, is called
Options
(a) net productivity (b) secondary productivity (c) net primary productivity (d) gross primary productivity
Correct Answer:
secondary […]
Which one of following pairs of gases are the major cause of Greenhouse effect
Options
(a) CO2 and O3 (b) CO2 and CO (c) CFCs and SO2 (d) CO2 and N2O
Correct Answer: […]
Which one of the following is one of the characteristics of a biological community?
Options
(a) Stratification (b) Natality (c) Mortality (d) Sex ratio
Correct Answer:
Stratification
Explanation:
No explanation available. Be the […]
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