Which of the following is the best method to dispose biological wastes from hospitals?
Landfill
Recycling
Incineration
Composting
Maximum energy is stored in
carnivores
producers
herbivores
decomposers
Which of the following is not a producer?
grass
zooplankton
phytoplankton
paddy
One of the following is not a biodegradable material. This one is:
cotton
animal bones
aluminium foil
wood
In a food chain, the third trophic level is always occupied by:
All food chains in a community give rise to a
climax community
food web
biosphere
ecosystem
The dominant second trophic level, in a lake ecosystem is
benthos
plankton
Which pollutant released into the air during refrigeration and air conditioning is the greatest contributor to the depletion of ozone layer?
BHC
DDT
CFC
NO
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
The flow of energy in an ecosystem is always:
unidirectional
linear
cyclic
multidirectional
