What is true of ecosystem ?
Primary consumers are least dependent upon producers
Primary consumers out - number producers
Producers are more than primary consumers
Secondary consumers are the largest and most powerful
The primary succession refers to the development of communities on a
Freshly cleared crop field.
Forest clearing after devastating fire.
pond , freshly filled with water after a dry phase.
Newly-exposed habitat with no record of earlier vegitation.
Tropical forests occur in India.
Jammu and Kashmir
Rajasthan
Kerala and Assam
The forests do not occur in India
The CO2 content by volume, in the atmospheric air is about:
0.0314%
0.34%
3.34%
4%
The sum total of the population of the same kind of organisms constitute
Colony
Genus
Community
Species
In a biotic community,the most important factor for survival of an animal is
Day length
Soil moisture
Green food
Predators
Major aerosol pollutant in jet plane emission is
Sulphur dioxide
Carbon monoxide
Methane
Chlorofluoro - carbons
Fish die in water bodies polluted by sewage due to
Pathogens
Clogging of gills by silt
Reduction in oxygen
Fuel smell
A sewage treatment process in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process, is called:
Cyclic treatment
Primary treatment
Activated sludge treatment
Tertiary treatment
Pyramid of number in a pond ecosystem is
Irregular
Inverted
Upright
Spindle - shaped