Energy Flow in an Ecosystem

Q. Find the odd one out:

1. Typha, Pistia, Eichhornia, Dipterocarpus
2. Teak, Parthenium, Pine, Sandalwood
3. Hyena, Cow, Deer, Rabbit
4. Fusarium, Leptocorsia, Aspergillus, Polycarpus

Q. Food chain constitutes the pathway for transfer of energy in any ecosystem.

1. True
2. False

Q. Which of the following can act as the top consumer in a grassland ecosystem?

1. Carnivores
2. Bacteria
3. Either carnivores or herbivores
4. Herbivores

Q. In an ecosystem, energy is dissipated as _______ energy which cannot be recycled.

1. light
2. chemical energy
3. heat
4. mechanical energy

Q. Assertion [A]: Trophic level represents a functional level, not a species as such.

Reason [R]: A given species may occupy more than one trophic level in the same ecosystem at the same time.

1. Both statements A and R are incorrect.
2. Statement A is correct and statement R is incorrect.
3. Both statements A and R are correct and statement R is the correct explanation of statement A.
4. Both statements A and R are correct and statement R is not the explanation of statement A.

Q.

Which of the following correctly represents the flow of energy in a grassland ecosystem?

1. Grass → Frog → Grasshopper → Snake

2. Grass → Frog → Snake → Grasshopper

3. Grass → Grasshopper → Snake → Frog

4. Grass → Grasshopper → Frog → Snake

Q.

Which one of the following abiotic components is not directly involved in plant growth?

1. Water

2. Rocks

3. Soil

4. Air

Q. Energy is lost when it is transferred between trophic levels.

1. True
2. False

Q. Arrange the organisms to form a food chain with the producer at the bottom.

1. Snake
2. Frog
3. Insects
4. Grass

Q. Which group of organisms together will not form a food chain?
I. Grass, lion, rabbit, wolf
II. Plankton, man, hawk
III. Lion, grass, snake, tiger
IV. Frog, snake, eagle, grass, grasshopper

1. I and III
2. III and IV
3. II and III
4. I and IV