Our Environment

A balanced aquarium is best described as

• a biome

• an ecosystem

• a community

• a biosphere

All the members of a species inhabiting a given location are known as a

• population

• community

• biome

• biological unit

Ozone layer is essential because it absorbs most of the

• infrared radiations

• heat

• solar radiation

• ultraviolet radiation

Which of the following is a non-biodegradable waste

• Cow dung

• Manure

• Plastics

• Kitchen waste

Which of the following is a biodegradable waste?

• Radioactive wastes

• Aluminium cans

• DDT

• Cattle dung

Acid rain is formed due to

• deforestation

• oxides of sulphur and nitrogen

• oil slick

• nuclear wastes

The presence of which of the following pollutants in the atmosphere has caused damage to Taj Mahal?

• CO₂

• SO₂

• Pb particles

• Radioactive elements

Ecosystem consists of

• a population

• a population and its non-living environment

• a biotic community

• a biotic community and its non-living environment

Biotic component of an ecosystem consists of

• producers

• consumers

• decomposers

• all of these

Animals found in an ecosystem are together called

• consumer organisms

• carnivore organisms

• micro consumer organisms

• producer organisms