The coldest biome on Earth is

(a)

Tundra

(b)

Taiga

(c)

Desert

(d)

Oceans

Nutrients are recycled in the atmosphere with the help of certain micro organisms, referred to as

(a)

Producers

(b)

Decomposers

(c)

Consumers

(d)

None of the above

Why is the usage of rainforest biomes for large scale agriculture unsustainable?

(a)

because it is too wet

(b)

because the temperature is too warm.

(c)

because the soil is too thin

(d)

because the soil is poor

The life supporting layer is known as

(a)

Atmosphere

(b)

Hydrosphere

(c)

Lithosphere

(d)

Biosphere

The branch of science that deals about ecosystem is called

(a)

Etymology

(b)

Geology

(c)

Limnology

(d)

Ecology

Abiotic components include

(a)

Non-living things

(b)

Living things

(c)

only plants

(d)

only animals

Zebra and goat come under __________consumers.

(a)

Primary

(b)

Secondary

(c)

Tertiary

(d)

None of the above

A healthy ecosystem provides

(a)

clean water

(b)

enriched soil

(c)

raw materials

(d)

All of the above

Assertion (A): In temperate grassland biomes pastoral industry becomes the main occupation.
Reason (R): Apart from wheat cultivation, tall and short soft grass are grown in th temperate grassland biomes.
a) Both assertion (A) and reason (R) are true; R explains A
b) Both assertion(A) and reason (R) are true; R does not explain A
c) A is true; R is false
d) Both A and R are false

(a)

Both assertion (A) and reasonrk) are true; R explains A

(b)

Both assertion(A) and reasontk) are true; R does not explain A

(c)

A is true; R is false

(d)

Both A and R are false

Assertion (A): Biosphere Reserves are established in India.
Reason (R): Today's loss of biodiversity is habitat alteration caused by human activities
a) Both assertion (A) and reason (R) are true; R explains A
b) Both assertion(A) and reason (R) are true; R does not explain A
c) A is true; R is false
d) Both A and R are false

(a)

Both assertion (A) and reasonrk) are true; R explains A

(b)

Both assertion(A) and reasontk) are true; R does not explain A

(c)

A is true; R is false

(d)

Both A and R are false