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Subjects
Science CBSE
Class 10
Our environment
Ecosystem and energy flow

2. NCERT exemplar and book back objective type questions

Exercise condition:

4 m.

Choose the correct answer:

1. Which of the following limits the number of trophic levels in a food chain?

Water
Sufficient food supply
Polluted air
Decrease in energy at higher trophic levels

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

primary consumer to secondary consumer
producer to decomposer
secondary consumer to primary consumer
producer to primary consumer

3. Which of the following groups contain only biodegradable items?

Fruit-peels, cake and lime-juice
Grass, flowers and leather
Cake, wood and grass
Grass, wood and plastic

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