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Question 1:

Which of the following is an example of a producer in an ecosystem?

A) Herbivore
B) Omnivore
C) Carnivore
D) Plant

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Explanation: The correct answer is D) Plant. Producers, also known as autotrophs, are organisms that can produce their own food using sunlight through photosynthesis or chemicals through chemosynthesis. Plants are the primary example of producers as they use sunlight to convert water and carbon dioxide into energy-rich molecules such as glucose. They form the basis of the food chain by providing energy to other organisms.

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Question 2:

Which of the following is an example of a consumer in an ecosystem?

A) Algae
B) Fungus
C) Rabbit
D) Bacteria

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Explanation: The correct answer is C) Rabbit. Consumers, also known as heterotrophs, are organisms that obtain energy by consuming other organisms. Rabbits are herbivores that feed on plants, making them consumers. They obtain their energy by consuming producers (plants) and are part of the food chain.

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Question 3:

What is the role of decomposers in an ecosystem?

A) They produce oxygen through photosynthesis
B) They break down dead organic matter
C) They capture sunlight energy to produce food
D) They regulate the population of other organisms

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Explanation: The correct answer is B) They break down dead organic matter. Decomposers play a crucial role in the ecosystem by breaking down dead organisms and organic waste into simpler forms of matter. They help recycle nutrients back into the soil and make them available for uptake by producers. Examples of decomposers include bacteria and fungi.

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Question 4:

Which of the following is a primary consumer in a food chain?

A) Lion
B) Deer
C) Grasshopper
D) Snake

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Explanation: The correct answer is C) Grasshopper. A primary consumer is an organism that directly feeds on producers (plants). Grasshoppers are herbivores that consume plants as their primary food source. They occupy the second trophic level in the food chain, directly above the producers.

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Question 5:

Which of the following best describes the relationship between producers, consumers, and decomposers in an ecosystem?

A) Producers consume consumers, and decomposers consume producers
B) Consumers consume producers, and decomposers consume consumers
C) Producers consume decomposers, and consumers consume producers
D) Producers provide energy for consumers, and decomposers break down dead organisms

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Explanation: The correct answer is D) Producers provide energy for consumers, and decomposers break down dead organisms. Producers (such as plants) convert sunlight into energy-rich organic compounds through photosynthesis, providing energy for the entire food chain. Consumers, such as herbivores and carnivores, obtain energy by consuming producers or other consumers. Decomposers play a critical role in breaking down dead organisms and organic matter, releasing nutrients back into the ecosystem for reuse by producers. These interactions ensure the flow of energy and nutrients in the ecosystem.