The ten per cent law is associated with
transfer of energy from various trophic levels to decomposers in a food chain
transfer of ATP energy into muscular energy
transfer of chemical energy from one organism to another
transfer of sun's energy to the organisms called producers
Which of the following does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
The dominant second trophic level, in a lake ecosystem is
benthos
plankton
zooplankton
phytoplankton
Sahara Desert was formed over a period of time due to one of the following uncontrolled activities of man:
a) excessive cutting down of forest plants and trees
excessive killing of large herbivores
excessive killing of large carnivores
excessive use of poisonous chemicals called herbicides
What percentage of sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as chemical energy of food?
99 per cent
10 per cent
1 per cent
20 per cent
All food chains in a community give rise to a
climax community
food web
biosphere
ecosystem
In an ecosytem, bacteria are considered as
micro-consumers
macro-consumers
primary consumers
secondary consumers
Which pollutant released into the air during refrigeration and air conditioning is the greatest contributor to the depletion of ozone layer?
BHC
DDT
CFC
A balanced aquarium is best described as
a biome
an ecosystem
a community
a biosphere
Which of these is an example of abiotic component?
Soil
Fungi
Green plants
Animals
