Question

Bioindicators are used for knowing

• A. Minerals
• B. Oxygen demand
• C. Air pollution
• D. All of the above

Answer 1

The correct option is D All of the above

Bioindicators are living organisms such as plants, animals, and microorganisms that are used as indicators. They are used for knowing the different content of an ecosystem such as minerals, oxygen demand, air pollution. Lichens are used for knowing air pollution. Algae bloom indicates large amount of nitrates and phosphates in lakes and rivers.

Thus, the correct answer is 'All of the above.'