Biodiversity Ecosystem Stability Quiz

Name:

Date:

📋 Instructions

Read each question carefully and choose the best answer. This quiz tests your understanding of how biodiversity helps ecosystems survive difficult conditions like food shortages, diseases, and climate change.

Time limit: 20 minutes

🌿 Part 1: Multiple Choice Questions

1. What is biodiversity?

A. The number of trees in a forest

B. The variety of living organisms in an ecosystem

C. The amount of rainfall in an area

D. The temperature changes in a habitat

2. During a food shortage, an ecosystem with high biodiversity is more stable because:

A. Animals can find alternative food sources

B. There are fewer predators

C. Plants grow faster

D. The weather becomes better

3. Which scenario shows how biodiversity helps during disease outbreaks?

A. All organisms get sick at the same time

B. Some species have natural resistance to the disease

C. Diseases spread faster in diverse ecosystems

D. Only plants are affected by diseases

4. Climate change affects ecosystems with low biodiversity more severely because:

A. They have too many species

B. They lack species that can adapt to new conditions

C. They are always in cold areas

D. They have more rainfall

5. A coral reef ecosystem is threatened by rising ocean temperatures. Which advantage would high biodiversity provide?

A. All coral species will survive equally

B. Some coral species may be heat-tolerant and survive

C. The temperature will decrease automatically

D. Fish will leave the reef permanently

✏️ Part 2: Short Answer

6. Explain in 2-3 sentences why the Philippine rainforests, which have high biodiversity, are better able to survive environmental challenges compared to monoculture farms.

7. Give one specific example of how biodiversity in Philippine marine ecosystems helps during typhoons.

🔑 Answer Key

Part 1: Multiple Choice

1. B - The variety of living organisms in an ecosystem

2. A - Animals can find alternative food sources

3. B - Some species have natural resistance to the disease

4. B - They lack species that can adapt to new conditions

5. B - Some coral species may be heat-tolerant and survive

Part 2: Sample Answers

6. Philippine rainforests have many different plant and animal species that can fill different roles in the ecosystem. If one species is affected by disease or climate change, other species can take over its function. Monoculture farms have only one crop species, so if that crop fails, the entire system collapses.

7. During typhoons, if shallow coral reefs are damaged, deeper-water species like sea grass beds and mangroves can provide shelter and food for marine animals until the reefs recover.