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

 In _______ forests, trees shed their leaves in a particular season.

(1) evergreen

(2) mangrove

(3) deciduous

(4) thorny

Biosphere refers

(1) the area of the land inhabited by living organism

(2) the part of ocean inhabited by plants and animals

(3) the portion of the earth, including the oceans, the land, the soil, and the atmosphere inhabited by living organisms

(4) the atmosphere surrounding the living organisms

Which of the following phenomena is supposedly associated with global warming?

(1) El Nino

(2) La Nina

(3) El Nino Modoki

(4) Southern Oscillation