One Mark Questions Answers

Social Science : Geography

BIOSPHERE

I. Choose the correct answer:

1. The coldest biomes on Earth is

a) Tundra

b) Taiga

c) Desert

d) Oceans

Answer : a) Tundra

2. This is the smallest unit of biosphere

a) Ecosystems

b) Biome

c) Environment

d) None of the above

Answer : Ecosystems

3. 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

Answer : b) Decomposers

4. To which climatic conditions are Xerophytic plants specifically adapted to?

a) Saline and sandy

b) Limited moisture availability

c) Cold temperature

d) Humid

Answer : a) Saline and sandy

5. 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

Answer : d) because the soil is poor

II. Assertion type questions

Directions:

A) Both A and R are correct and R explains A.

B) Bothe A and R are correct but R does not explain A.

C) A is correct but R is false.

D) A is false but R is correct.

1. Assertion : Heterotrophs do not produce their own food.

Reason : They depend on autotrophs for their nourishment

A) Both A and R are correct and R explains A.

B) Bothe A and R are correct but R does not explain A.

C) A is correct but R is false.

D) A is false but R is correct.

Answer : a) Both assertion (A) and reason (R) are true, R explains A

2. Assertion : Hotspots are the regions characterised by numerous endemic plants and animal species living in a vulnerable environment.

Reason : To manage and focus on conservation work more effectively researchers identified hotspots.

A) Both A and R are correct and R explains A.

B) Bothe A and R are correct but R does not explain A.

C) A is correct but R is false.

D) A is false but R is correct.

Answer : a) Both assertion (A) and reason (R) are true, R explains A

III. Fill in the blanks:

1. An area where animals, plants and micro organisms live and interact with one another is known as Ecosystem

2. Consumers are also called Heterotrophs.

3. Food web is a system of interlocking and independent food chains.

4. Biomes is an extensive large ecosystem.

5. The vegetative type commonly found in desert biomes is called Xerophytes

6. Estuaries is an aquatic biomes that is found where fresh water and salt water mix.