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
Bulk CO2 fixation occures in
Crop plants
Oceans
Tropical rain forests
Temperature forests
The sum total of the population of the same kind of organisms constitute
Colony
Genus
Community
Species
Study of inter-relationships between living organisms and their environment is
Ecology
Ecosystem
Phytogeography
Ethology
The worst environmental hazards were created by accidents in nuclear power plant and MIC gas tragedy respectively in:
Russia in 1990 and Bhopal in 1986.
Ukrain in 1988 and USA in 1984.
Bhopal in 1984 and Russia in 1990.
Ukrain in 1986 and Bhopal in 1984.
Desert plants are generally:
Viviparous
Succulent
Herbaceous
Heterophyllus
If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected, because:
Energy flow will be blocked.
Herbivores will not receive solar energy.
Mineral movement will be blocked.
Rate of decomposition will be very high.
Which one of the following organism is used as indicator of water quality ?
Beggiatoa
Chlorella
Azospirillum
Escherichia
Soil water available to roots is
Surface water
Hygroscopic water
Gravitational water
Capillary water
In a food chain, the largest population is that of:
Decomposers
Producers
Primary consumers
Tertiary consumers
