With reference to food chains in ecosystems, consider the following statements:
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is/are correct?
Consider the following pairs:
| National park | River flowing through the Park |
| 1.) Corbett National park | Ganga |
| 2) Kaziranga National park | Manas |
| 3) Silent Valley National Park | Kaveri |
Which of the above pairs is/are correctly matched?
consider the following organisms:
1. Agricus
2. Nostoc
3. Spirogyra
Which of the above is/are used as biofertilizer/biofertilizers?
Which of the following adds/add nitrogen to the soil?
1. Excretion of urea by animals
2. Burning of coal by man
3. Death of vegetation
Select the correct answer using the codes given below:
In which of the following States is lion-tailed macaque found in its natural habitat?
1. Tamil Nadu
2. Kerala
3. Karnataka
4. Andhra Pradesh
Select the correct answer using the codes given below:
