Which of these is an example of abiotic component?
Soil
Fungi
Green plants
Animals
Which of the following is the best method to dispose biological wastes from hospitals?
Landfill
Recycling
Incineration
Composting
The flow of energy in an ecosystem is always:
unidirectional
linear
cyclic
multidirectional
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
A balanced aquarium is best described as
a biome
an ecosystem
a community
a biosphere
All food chains in a community give rise to a
climax community
food web
biosphere
ecosystem
In a food chain, the third trophic level is always occupied by:
carnivores
herbivores
decomposers
producers
The dominant second trophic level, in a lake ecosystem is
benthos
plankton
zooplankton
phytoplankton
One of the following is not a biodegradable material. This one is:
cotton
animal bones
aluminium foil
wood
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
