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
Which of the following cannot be added in a composting pit to prepare compost?
sunflower plants
fruit and vegetable peels
flowers of plastic
red worms
In a food chain, the third trophic level is always occupied by:
carnivores
herbivores
decomposers
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
One of the following is not a biodegradable material. This one is:
cotton
animal bones
aluminium foil
wood
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
All food chains in a community give rise to a
climax community
food web
biosphere
ecosystem
A balanced aquarium is best described as
a biome
an ecosystem
a community
a biosphere