Biosphere is:

1.	A component in the ecosystem
2.	Composed of the plants present in the soil
3.	Life in the outer space
4.	Composed of all living organisms present on earth which interact with the physical environment

The ecological niche is:

According to Allen’s Rule, mammals from colder climates have:

1. Shorter ears and longer limbs

2. Longer ears and shorter limbs

3. Longer ears and longer limbs

4. Shorter ears and shorter limbs

Salt concentration (Salinity) of the sea measured in parts per thousand is:

1. 10-15

2. 30-70

3. 0-5

4. 30-35

Formation of tropical forests needs mean annual temperature and mean annual precipitation as:

1. 18 – 25 °C and 150 – 400 cm

2. 5 – 15 °C and 50 – 100 cm

3. 30 - 50°C and 100 – 150 cm

4. 5 – 15 °C and 100 – 200 cm

Which of the following forest plants controls the light conditions at the ground?

1. Lianas and climbers

2. Shrubs

3. Tall trees

4. Herbs

What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?

If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the percent growth or birth rate per individual per hour?

A population has more young individuals compared to older individuals. What would be the status of the population after some years?

1. It will decline

2. It will stabilize

3. It will increase

4. It will first decline and then stabilize

What parameters are used for the tiger census in our country’s national parks and sanctuaries?