Quiz for Ecosystems

Q1: Which of the following is a primary consumer in a grassland ecosystem?

A. Grass B. Rabbit C. Tiger D. Fungi

Q2: What is the main source of energy in an ecosystem?

A. Oxygen B. Glucose C. Sunlight D. Carbon dioxide

Q3: Which of the following organisms are decomposers?

A. Fungi B. Fish C. Grass D. Goat

Q4: In an ecosystem, the pyramid of energy is always:

A. Upright B. Inverted C. Linear D. Circular

Q5: Which one of the following is not a biotic component?

A. Algae B. Bacteria C. Light D. Fungi

Q6: The rate of formation of new organic matter by consumers is called:

A. Gross primary productivity B. Net primary productivity C. Secondary productivity D. Decomposition

Q7: Which gas is produced during decomposition of organic matter?

A. Methane B. Oxygen C. Hydrogen D. Nitrogen

Q8: The term "biomass" refers to:

A. Total weight of organisms B. Number of organisms C. Energy content of ecosystem D. Productivity rate

Q9: Which one of the following is a producer in an aquatic ecosystem?

A. Algae B. Fish C. Crab D. Frog

Q10: Which pyramid can never be inverted?

A. Pyramid of number B. Pyramid of biomass C. Pyramid of energy D. All of the above

Q11: Which of the following is a heterotroph?

A. Grass B. Algae C. Herbivore D. Cyanobacteria

Q12: Tertiary consumers feed on:

A. Producers B. Primary consumers C. Secondary consumers D. Decomposers

Q13: The process of nutrient enrichment in water bodies is called:

A. Biomagnification B. Eutrophication C. Sedimentation D. Decomposition

Q14: Which one of the following is an example of detritus food chain?

A. Grass → Deer → Lion B. Dead leaves → Earthworm → Bird C. Algae → Fish → Eagle D. Phytoplankton → Zooplankton → Fish

Q15: Which ecosystem has the highest productivity?

A. Desert B. Tundra C. Tropical rainforest D. Grassland

Q16: An example of an abiotic component of an ecosystem is:

A. Plants B. Soil C. Animals D. Fungi

Q17: Food web differs from food chain in that it shows:

A. Linear path B. Only herbivores C. Interconnected food chains D. Energy flow only

Q18: Standing crop is measured in terms of:

A. Number or biomass B. Only number C. Only weight D. Height of crop

Q19: Which of the following helps in recycling of nutrients?

A. Producers B. Consumers C. Decomposers D. Herbivores

Q20: Primary productivity is affected by:

A. Temperature and rainfall B. Species diversity C. Availability of decomposers D. Predator-prey ratio