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?

Which of the following would necessarily decrease the density of a population in a given habitat?

A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?

In 2005, for each of the 14 million people present in a country, 0.028 were born and 0.008 died during the year. Using the exponential equation, the number of people present in 2015 is predicted as: