Which one of the following is the best description of the term “ecosystem”?

‘BioCarbon Fund Initiative for Sustainable Forest Landscapes’ is managed by the -

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture?

1. The proliferation of nitrogen-fixing microorganisms in the soil can occur.
2. Increase in the acidity of soil can take place
3. Leaching of nitrate to the ground-water can occur.

Select the correct answer using the code given below.

With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements:

1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).

Which of the statements given above is/are correct?

Which one of the following National Parks has a climate that varies from tropical to subtropical, temperate and Arctic?

With reference to an organization known as ‘Birdlife International’ which of the following statements is/are correct?

1. It is a Global Partnership of Conservation Organizations.
2. The concept of ‘biodiversity hotspots’ originated from this organization.
3. It identifies the sites known/referred to as ‘Important Bird and Biodiversity Areas’.

Select the correct answer using the code given below.