What makes an ecosystem ?

(1) A living community and its environment

(2) All the plants and animals of an area

(3) Carnivores and herbivores of an area

(4) Producers, consumers and decomposers in a particular locality

The Source of energy in the ecosystem is

(1) Sun

(2) Green plants

(3) Sugar produced in photosynthesis

(4) ATP

The area reserved for the welfare of wildlife is called :

(1) Sanctuary

(2) Forest

(3) National Park

(4) Botanical garden

There is a need to keep the larger areas under forests for :

(1) absorption of carbon dioxide

(2) protecting wildlife

(3) raising precipitation

(4) geological balance

Dumping of solid waste in low lying areas earth cover is called as :

(1) Sanitary landfilling

(2) Open dumping

(3) Composting

(4) Incineration

The cause of loss of forest cover is

(1) Agriculture

(2) Building Industry

(3) Increasing population

(4) Tourism & pilgrimage

'Green House Effect' means

(1) Pollution in houses in tropical regions

(2) Trapping of solar energy due to atmospheric oxygen

(3) Trapping of solar energy due to atmospheric carbon dioxide

(4) Cultivation in greenhouses so as to check pollution

A natural region has the similarity of

(1) climate and natural vegetation

(2) climate and occupation

(3) soil and drainage

(4) economic base and recess

Global warming is expected to result in

(1) Increase in the level of the sea

(2) Change in crop pattern

(3) Change in the coastline

(4) All of the above

Man can maintain an ecological balance in the biosphere by

(1) deforestation

(2) developing new breeds of cultivated plants and domesticated animals

(3) using insecticides and pesticides

(4) understanding of the delicate balance in the relative number of organisms

Which of the following exhibits unidirectional flow in an ecosystem?

(1) Light

(2) Energy

(3) Water

(4) Biomass