Virtually treeless, sparse vegetation is found in :

(1) Taiga

(2) Alpine

(3) Tundra

(4) Chapparal

Name the condition which influences the development of plants into distinctive forms.

(1) Climatic conditions

(2) Soil conditions

(3) Environmental conditions

(4) Social conditions

Species which has restricted distribution is called

(1) Eco species

(2) Endemic

(3) Sympatric

(4) Allopatric

The space retaining life in any form is called

(1) Biomass

(2) Biosphere

(3) Lithosphere

(4) Hydrosphere

Which of the following is a Biological method of soil conservations ?

(1) Contour farming

(2) Contour terracing

(3) Gully control

(4) Basin listing

With what bio-region is the term ‘‘Steppe’’ associated?

(1) Grasslands

(2) Tropical forests

(3) Savanna

(4) Coniferous forests

The tropical rain forest is characterised by

(1) Absence of trees

(2) Least productivity

(3) Maximum biodiversity

(4) Minimum biodiversity

Natural sources of air pollution are

(1) Forest fires

(2) Volcanic eruptions

(3) Dust storm

(4) Smoke from burning dry leaves

Which one of the following is the correct sequence of the ecosystem in the order of decreasing productivity?

(1) Oceans, mangroves, lakes, grassland

(2) Mangroves, oceans, grassland, lakes

(3) Oceans, lakes, grassland, mangroves

(4) Mangroves, grasslands, lakes, oceans

Evergreen type Forests are found in

(1) Mediterranean region

(2) Monsoon climatic area

(3) Desert region

(4) Equatorial region

The maximum biodiversity is found in

(1) Tropical rain forests

(2) Temperate forests

(3) Coniferous forests

(4) Arctic forest