Which important green-house gas, other than methane, is being produced from the agricultural fields?
Arsine
Sulphur dioxide
Ammonoa
Nitrous oxide
The transfer of energy from one trophic level to another is governed by the second law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is:
5%
10%
25%
50%
Carbon monoxide is a pollutant because:
It reacts with O2
It inhibits glycolysis
It reacts with haemoglobin
It makes nervous system inactive
Fish die in water bodies polluted by sewage due to
Pathogens
Clogging of gills by silt
Reduction in oxygen
Fuel smell
The sum total of the population of the same kind of organisms constitute
Colony
Genus
Community
Species
Which of the following ecosystem has the highest gross primary productivity ?
Grasslands
Coral reefs
Mangroves
Equatorial rain forest
Pyramid of numbers in a grassland / true ecosystem is
Always inverted
Always upright
Both (a ) and ( b )
Spindle-shaped
Soil particles determine its
Texture
Field capacity
Water holding capacity
Soil flora
The major contributor of green - house gases to the atsmosphere is:
Russia
USA
Germany
Brazil
Which one is not a pollutant normally?
Hydrocarbons
Carbon dioxide
Carbon monoxide
