The problem caused due to ozone hole is

• earthquakes

• damage due to UV radiations

• chemical pollution

• acid rain

Which of the statements is incorrect?

• All green plants and blue green algae are producers

• Green plants get their food from organic compounds

• Producers prepare their own food from inorganic compounds

• Plants convert solar energy into chemical energy

What will happen if deer is missing in the food chain given below?

Grass → Deer → Tiger

• The population of tiger increases

• The amount of grass decreases

• Tiger will start eating grass

• The population of tiger decreases and the amount of grass increases

Which of these does not belong to biotic component?

• Parasites

• Fungi

• Bacteria

• Soil

Which of these organisms are the most important decomposers in an ecosystem?

• Algae and fungi

• Fungi and bacteria

• Algae and bacteria

• Bacteria and virus

The decomposers in an ecosystem

• convert inorganic material, to simpler forms

• convert organic material to inorganic forms

• convert inorganic materials into organic compounds

• do not breakdown organic compounds

A network of food chains is called a …………….

Environment consists of ________

• Air

• Water

• Land

• All of the above

Which of the following is non living things?

• Petrol

• Paper

• Car

• All of the above

Which of the following natural thing?

• Earth

• Land

• Sea

• All of the above