ECOSYSTEM STRUCTURE & FUNCTION OUR ENVIRONMENT 15 Class 10th Biology (Practice Sheet) 1 Which of the following is a primary consumer in an ecosystem? A. Lion B. Deer C. Grass D. Fungi 2 What is the primary source of energy in most ecosystems? A. Wind B. Water C. Sunlight D. Soil 3 Which organisms break down dead organic matter in an ecosystem? A. Producers B. Consumers C. Decomposers D. Predators 4 What role do autotrophs play in an ecosystem? A. Consume other organisms B. Produce their own food C. Break down organic matter D. Regulate the ecosystem temperature 5 In the food chain, what are tertiary consumers? A. Carnivores or omnivores B. Herbivores C. Producers D. Decomposers 6 Define primary consumers and give an example. 7 What distinguishes autotrophs from heterotrophs in an ecosystem? 8 How do quaternary consumers relate to the food chain? 9 How does energy flow in an ecosystem? 10 Describe the process of nutrient cycling in an ecosystem. Page 1 Email: Phone No: Website:
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