Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).

Assertion (A):	A person goes to a high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.
Reason (R):	Due to low atmospheric pressure at high altitudes, the body does not get sufficient oxygen.

In light of the above statements, choose the correct answer from the options given below:

1.	(A) is true but (R) is false.
2.	(A) is false but (R) is true.
3.	Both (A) and (R) are true and (R) is the correct explanation of (A).
4.	Both (A) and (R) are true but (R) is not the correct explanation of (A).

Match List-I with List-II

Choose the correct answer from the options given below :

When we migrate from dark to light, we fail to see for sometimes but after a time visibility becomes normal. It is an example of:
1.  Accommodation
2.  Adaptation
3.  Mutation
4.  Photoperiodism

In which one of the following habitats does the diurnal temperature of the soil surface vary most?

1. Forest

2. Desert

3. Grassland

4. Shrubland 

In which of the following pairs is the specific characteristic of a soil not correctly matched:

1. Terra rossa – Most suitable for roses

2. Chernozems – the richest soil in the world

3. Black soil – Rich in calcium carbonate

4. Laterite – Contains an aluminium compound

A terrestrial animal must be able to: 

1. Conserve water
2. Actively pump salts out, through the skin
3. Excrete large amounts of salts in urine
4. Excrete large amounts of water in urine

In which biome a new plant may adapt soon?
1.  Tropical rain forest
2.  Desert
3.  Mangrove
4.  Sea island

Animals of desert are:
1.  Arboreal
2.  Fossorial
3.  Crepuscular
4.  Nocturnal

Acacia, Prosopis and Capparis belong to:
1.  Deciduous forest
2.  Tropical forest
3.  Thorn forest
4.  Evergreen forest

Which one of the following pairs is mismatched:

1. Savanna - acacia trees

2. Coniferous forest - evergreen trees

3. Tundra - permafrost

4. Prairie - epiphytes