Which of the following are detritivores?

1. Earthworms
2. Jellyfish
3. Millipedes
4. Seahorses
5. Woodlice

Select the correct answer using the code given below.

1. 1, 2 and 4 only
2. 2, 3, 4 and 5 only
3. 1, 3 and 5 only
4. 1, 2, 3, 4 and 5

Explanation

Earthworms are detritivores

• Detritivores are organisms that feed on dead organic matter, particularly decomposing plant and animal remains. They play an essential role in the ecosystem by breaking down organic matter into simpler substances, which enhances nutrient cycling and soil fertility. Detritivores differ from decomposers such as fungi and bacteria in that they physically ingest decaying material.
• Earthworms live underground in soil and primarily consume the organic material found under the soil surface, such as the roots and leaves of dead plants. They play an important role in soil rejuvenation, fertilising, and aerating the soils they inhabit

Jellyfish are not detritivores

• Jellyfish are carnivorous, primarily feeding on small fish, zooplankton, and other marine organisms.

Millipedes are detritivores

• Millipedes feed on decaying leaves, wood, and other organic material. They help break down plant matter, accelerating the decomposition process and releasing nutrients back into the soil.

Seahorses are not detritivores

• Seahorses are not detritivores; they are small carnivorous fish that feed primarily on tiny crustaceans such as shrimp and other planktonic organisms

Woodlice are detritivores

• Woodlice are detritivores, feeding mostly on dead plant and animal matter in the soil and leaf litter.

Answer: (c) 1, 3 and 5 only; Difficulty Level: Medium