What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.

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Solution

Herbivores that feed on plants are called primary consumers. Example: Insects.
Small carnivores that feed on other animals, especially herbivores, are called secondary consumers. Example: Frogs.
Large carnivores that feed on other animals, especially secondary consumers, are called tertiary consumers. Example: Birds.

Insects $\to$ Frogs $\to$ Birds
(Primary consumers) (Secondary consumers) (Tertiary consumers)

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If a grasshopper is eaten by a frog, then the energy transfer will be from :

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(d) secondary consumer to tertiary consumer

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(Producer) (Consumer primary) (Consumer secondary) (Consumer tertiary)

Energy enters in a food chain through :

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