Question

Decomposers are

• A. Autotrophs
• B. Heterotrophs
• C. Organotrophs
• D. Autoheterotrophs

Answer 1

The correct option is B

Heterotrophs

The correct option is B.

The explanation for the correct option:

1. Decomposers are heterotrophic organisms as they feed on dead and decaying matter.
2. Heterotrophs are those organisms that cannot prepare their own food from nature and hence depend on other organisms which produce food (autotrophs).
3. Bacteria, fungi, and worms are examples of decomposers.
4. Decomposers are heterotrophs that break down and feed on the remains of dead organisms and other organic wastes such as feces.
5. Heterotrophs are secondary and tertiary users in the food chain.
6. They are directly or indirectly dependent on the producers for food.
7. Example: All animals, human beings, etc.

The explanation for the incorrect options:

Option A:

1. Autotrophs are organisms that produce their own food by the process of photosynthesis.
2. Examples: all plants.

Option C:

1. An organotroph is an organism that obtains hydrogen or electrons from organic substrates.
2. Examples: humans, fungi, and many prokaryotes.

Option D:

1. Autoheterotrophs are organisms that are partial to photosynthesis.
2. Examples: bacteria, fungi, yeast, cows, dogs, and humans.

Final answer: Decomposers are heterotrophs.