Ecosystem Structure and Function - Unsolved Practice Set
Chapter: Ecosystem | Topic: Ecosystem Structure and Function
ECOSYSTEM STRUCTURE AND FUNCTION - UNSOLVED PRACTICE SET
Topic: Ecosystem Structure and Function
Multiple Choice Questions
Q1. An ecosystem is best defined as:
- A group of organisms of the same species living together
- A functional unit consisting of living organisms interacting with each other and with their physical environment
- Only the non-living components of an environment
- A single organism and its habitat alone
Q2. The biotic components of an ecosystem include:
- Only temperature and rainfall
- Producers, consumers, and decomposers
- Only soil and minerals
- Only sunlight
Q3. Producers in an ecosystem are organisms that:
- Consume other organisms for energy
- Synthesise their own food through photosynthesis (or chemosynthesis)
- Break down dead organic matter
- Cannot survive without consuming other organisms
Q4. Decomposers play a crucial functional role in an ecosystem by:
- Producing food through photosynthesis
- Breaking down dead organic matter and recycling nutrients back into the ecosystem
- Consuming only living plant material
- Having no significant ecological function
Q5. The vertical layering of different species within an ecosystem, such as in a forest, is referred to as:
- Productivity
- Stratification
- Biomagnification
- Succession
Short Answer Questions
Q6. Define an ecosystem, in your own words.
Q7. Differentiate between the biotic and abiotic components of an ecosystem.
Q8. Name the three main functional/trophic categories of biotic components in an ecosystem, and briefly describe the role of each.
Q9. What is stratification in an ecosystem, and why does it occur?
Long Answer Questions
Q10. Discuss the structural components of an ecosystem, describing both abiotic and biotic factors and how they interact.
Q11. Explain the key functional aspects of an ecosystem, including productivity, decomposition, energy flow, and nutrient cycling.
APPLICATION / ANALYSIS
Q12. A student visits a local pond and observes fish, aquatic plants, algae, insects, and decomposing leaf litter at the bottom. Identify which of these components would be classified as producers, consumers, and decomposers in this ecosystem.
Q13. A forest ecosystem shows distinct layers - tall trees at the top, shrubs in the middle, and small plants close to the ground, each occupied by different animal species. Explain, using your understanding of ecosystem structure, why this kind of stratification benefits the overall diversity of species in the forest.