Ecotone is

1. a polluted area

2. the bottom of a lake

3. a zone of transition between two communities

4. a zone of developing community

Biosphere is

Ecological niche is

If a population of 50 Paramecium present in a pool increases to 150 after an hour, what would be the growth rate of the population?

1. 50 per hour

2. 200 per hour

3. 5 per hour

4. 100 per hour

What would be the percent growth or birth rate per individual per hour for the same population mentioned in the previous question (Question 10)?

1. 100

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

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

1. Pug marks only

2. Pug marks and fecal pellets

3. Fecal pellets only

4. Actual headcounts

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?

1. 128

2. 24

3. 64

4. 32

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 exponential equation, the number of people present in 2015 is predicted as

1. 25 millions

2. 17 millions

3. 20 millions

4. 18 millions