Which of the following is not a producer?
grass
zooplankton
phytoplankton
paddy
Which of the following is the best method to dispose biological wastes from hospitals?
Landfill
Recycling
Incineration
Composting
In the food chain comprising of a snake, grass, insect, and frog, the secondary consumer is:
insect
snake
frog
A balanced aquarium is best described as
a biome
an ecosystem
a community
a biosphere
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
Which of the following constitutes a food chain?
Grass, Wheat and Mango
Grass, Goat and Human
Goat, Cow and Elephant
Grass, Fish and Goat
The use of one of the following will pollute the environment. This one is:
paper carry bags
cotton cloth carry bags
nylon cloth carry bags
jute carry bags
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
Maximum energy is stored in
carnivores
producers
herbivores
decomposers
Which of these is an example of abiotic component?
Soil
Fungi
Green plants
Animals
