Biology Grade 10 MCQs Chapter 16

 Multiple-choice questions from Chapter 16. Each question is designed to test your understanding of key concepts. The correct answers are provided below each question. Let's begin!

Environmental Science MCQs

1. What is water pollution?

Ⓐ The natural purification of water
Ⓑ The contamination of water bodies by harmful substances ✅
Ⓒ The evaporation of water from water bodies
Ⓓ The flow of water in rivers

2. Which of the following is a cause of water pollution?

Ⓐ Evaporation
Ⓑ Industrial waste ✅
Ⓒ Photosynthesis
Ⓓ Condensation

3. What is eutrophication?

Ⓐ The purification of water bodies
Ⓑ The excessive growth of algae due to nutrient overload ✅
Ⓒ The natural filtering of water by soil
Ⓓ The process of water evaporation

4. What is the process of converting nitrogen gas into ammonia called?

Ⓐ Nitrification
Ⓑ Denitrification
Ⓒ Nitrogen fixation ✅
Ⓓ Ammonification

5. Which bacteria convert ammonia into nitrite and nitrate?

Ⓐ Denitrifying bacteria
Ⓑ Nitrogen-fixing bacteria
Ⓒ Nitrifying bacteria ✅
Ⓓ Decomposers

6. What is urbanization?

Ⓐ The movement of people from cities to rural areas
Ⓑ The movement of people from rural areas to cities ✅
Ⓒ The growth of forests in rural areas
Ⓓ The decline of city populations

7. Which of the following is a greenhouse gas?

Ⓐ Oxygen
Ⓑ Nitrogen
Ⓒ Carbon dioxide ✅
Ⓓ Hydrogen

8. What does a pyramid of biomass represent?

Ⓐ The flow of energy in an ecosystem
Ⓑ The amount of biomass at each trophic level ✅
Ⓒ The number of organisms in an ecosystem
Ⓓ The rate of photosynthesis

9. What is a parasitic plant?

Ⓐ A plant that produces its own food
Ⓑ A plant that obtains nutrients from another plant ✅
Ⓒ A plant that helps other plants grow
Ⓓ A plant that decomposes dead organisms

10. What is a mutualistic relationship?

Ⓐ A relationship where one organism benefits and the other is harmed
Ⓑ A relationship where both organisms benefit ✅
Ⓒ A relationship where one organism hunts and eats another
Ⓓ A relationship where organisms compete for resources

Environmental Science MCQs

1. What is air pollution?

Ⓐ The natural purification of air
Ⓑ The contamination of air by harmful substances ✅
Ⓒ The flow of air in the atmosphere
Ⓓ The process of photosynthesis

2. Which of the following is a cause of air pollution?

Ⓐ Photosynthesis
Ⓑ Industrial emissions ✅
Ⓒ Condensation
Ⓓ Evaporation

3. What is smog?

Ⓐ A type of clean air
Ⓑ A mixture of smoke and fog ✅
Ⓒ A natural phenomenon
Ⓓ A type of cloud

4. What is the ozone layer?

Ⓐ A layer of dust in the atmosphere
Ⓑ A layer of gases that protects Earth from UV radiation ✅
Ⓒ A layer of clouds
Ⓓ A layer of water vapor

5. What is competition?

Ⓐ The interaction between a predator and prey
Ⓑ The struggle between organisms for resources ✅
Ⓒ A mutualistic relationship
Ⓓ The process of decomposition

6. What is a biome?

Ⓐ A small habitat
Ⓑ A large geographic region with distinct climate and life ✅
Ⓒ A type of ecosystem
Ⓓ A type of food chain

7. What is a food web?

Ⓐ A single sequence of organisms
Ⓑ A network of interconnected food chains ✅
Ⓒ A group of decomposers
Ⓓ A group of producers

8. What do arrows in a food web show?

Ⓐ The direction of water flow
Ⓑ The direction of energy transfer ✅
Ⓒ The movement of animals
Ⓓ The flow of nutrients

9. What are the four R's of waste management?

Ⓐ Read, write, recycle, recover
Ⓑ Reduce, reuse, recycle, recover ✅
Ⓒ Remove, replace, recycle, reuse
Ⓓ Research, reuse, reduce, recover

10. What does "reduce" mean in waste management?

Ⓐ To recycle waste
Ⓑ To decrease the amount of waste produced ✅
Ⓒ To reuse items
Ⓓ To recover energy from waste

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