Biotic component of the environment does not include soil system. Biotic component includes animal and plants, while sunlight, soil, temperature, water and air are all abiotic components of ecosystem.

Correct Option: A

Biotic component of the environment does not include soil system. Biotic component includes animal and plants, while sunlight, soil, temperature, water and air are all abiotic components of ecosystem.

mangrove forests in Asia are largely concentrated in Indonesia. Mangroves are salt-tolerant plants of tropical and subtropical intertidal regions of the world. The specific regions where these plants occur are termed as 'mangrove ecosystem'. These are highly productive but extremely sensitive and fragile. Besides mangroves, the ecosystem also harbours other plant and animal species, unique to that habitat.

Correct Option: C

mangrove forests in Asia are largely concentrated in Indonesia. Mangroves are salt-tolerant plants of tropical and subtropical intertidal regions of the world. The specific regions where these plants occur are termed as 'mangrove ecosystem'. These are highly productive but extremely sensitive and fragile. Besides mangroves, the ecosystem also harbours other plant and animal species, unique to that habitat.

Higher order biotic level includes populations. A population is a summation of all the organisms of the same group or species, who live in the same geographical area, and have the capability of interbreeding. Population is defined as the area where inter-breeding is potentially possible between any pair within the area.

Correct Option: A

Higher order biotic level includes populations. A population is a summation of all the organisms of the same group or species, who live in the same geographical area, and have the capability of interbreeding. Population is defined as the area where inter-breeding is potentially possible between any pair within the area.

Hydrological cycle is a part of Geological cycle. The example of hydrological cycle is water cycle in which sun plays an important role. This cycle is the only source of water for living organism present on earth surface.

Correct Option: C

Hydrological cycle is a part of Geological cycle. The example of hydrological cycle is water cycle in which sun plays an important role. This cycle is the only source of water for living organism present on earth surface.

Equatorial evergreen forests are designated as the 'lunges of the world'. These forests, are among the world's largest and most efficient living storehouses of carbon monoxide, the "greenhouse gas" most responsible for the earth's temperature rises and changes in the planet's climate.

Correct Option: D

Equatorial evergreen forests are designated as the 'lunges of the world'. These forests, are among the world's largest and most efficient living storehouses of carbon monoxide, the "greenhouse gas" most responsible for the earth's temperature rises and changes in the planet's climate.