Trees are leafless for a shorter or longer season of the year in :

(1) Evergreen forest

(2) Mangrove forest

(3) Scrub jungle forest

(4) Deciduous forest

Snakes and vultures are eating rats in a field. If wild dogs are let into the field, what will be the immediate result?

(1) Decrease in the number of snakes

(2) Decrease in the number of vultures

(3) Decrease in the number of rats

(4) Increase in the number of snakes

Coastal Andhra Pradesh and Orissa often face natural disasters due to

(1) Cyclones

(2) Earthquakes

(3) Landslides

(4) Tornadoes

The main cause of global climatic change is

(1) increase in the content of carbon dioxide in the atmosphere

(2) emissions of industrial gases

(3) adding dust

(4) changes in plant cover

The sphere of living matter together with water, air, and soil on the surface of the earth is known as

(1) Lithosphere

(2) Biosphere

(3) Hydrosphere

(4) Atmosphere

‘Green Accounting’ means measuring the National Income of the country taking into account estimation of

(1) the total forest area of the country

(2) the destruction of forest cover of the country

(3) pollution and environmental damage

(4) area of reclaimed fallow land

Which one of the following is an abiotic and renewable resource?

(1) iron ore

(2) livestock

(3) water

(4) forests

The largest ecosystem of the Earth is

(1) Biome

(2)Hydrosphere

(3) Lithosphere

(4)Biosphere

An artificial ecosystem is represented by :

(1) pisciculture tank

(2) agricultural land

(3) zoo

(4) aquarium

Which is the most stable ecosystem?

(1) Desert

(2) Ocean

(3) Mountain

(4) Forest

An ecosystem consists of :

(1) producers, consumers and decomposers in a particular area.

(2) all the plants and animals of an area.

(3) a living community and its environment.

(4) carnivorous and herbivorous of an area