Ecotechnology Quiz on Algae and Wastewater Treatment

What role do algae play in wastewater treatment?

• They create more waste.

• They increase the temperature of the water.

• They produce harmful gases.

• They remove organic carbon and inorganic nutrients.

Which nutrient is NOT mentioned as being removed by algae?

• Nitrogen

• Phosphorus

• Organic carbon

• Potassium

What is a significant advantage of using microalgae for wastewater treatment?

• They require a lot of external organic carbon.

• They can produce high-value products.

• They do not grow in polluted water.

• They are less efficient than conventional methods.

What is eutrophication?

• A process that cleans water.

• An accelerated growth of algae and plants due to nutrient accumulation.

• A method of CO2 fixation.

• A type of heavy metal.

Which gas is primarily responsible for greenhouse gas emissions?

• Methane

• Ozone

• Carbon dioxide

• Nitrous oxide

What is one method of CO2 mitigation mentioned in the text?

• Increasing industrial emissions.

• Chemical reactions with alkaline solutions.

• Using fossil fuels.

• Planting more trees.

Which organisms are highlighted for their fast growth rates compared to terrestrial plants?

• Microalgae and cyanobacteria

• Fungi

• Mosses

• Lichens

What are phytochelatins and metallothioneins?

• Waste products from algae.

• Nutrients for algae growth.

• Binding proteins that help in heavy metal tolerance.

• Types of algae.

What is one mechanism by which algae remove heavy metals from water?

• Evaporation.

• Photosynthesis only.

• Chemical reactions with water.

• Metabolism dependent uptake.

Which of the following is NOT a feature of algae that makes them suitable for heavy metal removal?

• Ability to grow in extreme temperatures.

• High tolerance to heavy metals.

• Large surface area/volume ratios.

• Potential for genetic manipulation.