The bulk fixation of carbon through photosynthesis take place in ------
crop plants
oceans
tropical rain forests
both tropical rain forests and crop plants
____________ resources are those whose entire quantity may not be known as these are not being used at present.
Natural
Physical
Actual
Potential
The species, which are in danger of extinction are referred as -------
endangered species
vulnerable species
threatened species
rare species
Water is a ------ resource
degradable maintanable
non degradable maintainable
renewable
non renewable
On the basis of origin, resources can be classified into ________.
Two
Three
Four
Five
Soil erosion can be prevented by
restricted human activity
good plant cover
checking movement of animals
wind screen alone
Sheet erosion is due to
fast running rivers
heavy rains
occassional rivers
wind
_____________ resources are being used in the present.
None of these
Minerals and metals are
biodegradable resources
non-renewable
inexhaustable
