In this soil conservation method, several grasses are left out in soil after the crop is harvested
Contour farming
Terrace farming
Tillage
Crop rotation
Eurythermal animals and plants are those which
can tolerate only a small variation in temperature
can tolerate large variation in temperature
cannot tolerate any change in temperature
are affected by temperature
Soil erosion is prevented by
deforestation'afforestation
reduction of CFCs production
afforestation
use of CNG in all transports
Which of the following is an inexhaustible resource ?
Fossil fuel
Solar energy
Coal
Petroleum
The ozone layer is found in
troposphere
mesosphere
stratosphere
atmosphere
Mercury pollution causes
black foot diseases
itai-itai diseases
blue-baby syndrome
Minamata disease
Contour farming is usually employed in
hilly areas
sandy areas
sea beaches
All of these
Which one of the following is an example of exsitu conservation ?
wild life sanctuary
seed bank
sacred groves
national park
The alien species introduced into lake Victoria that was responsible for the extinction of Cichlid fishes is
African catfish
Water hyacinth
Carrot grass
Nile perch
Which one of the following has maximum genetic diversity in India ?
Teak
Mango
Wheat
Tea
