Q. 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.
a) 1, 2 and 4 only
b) 2, 3, 4 and 5 only
c) 1, 3 and 5 only
d) 1, 2, 3, 4 and 5
Correct Answer: c) 1, 3 and 5 only
Question from UPSC Prelims 2021 GS Paper
Explanation :
Role of Detritivores in Ecosystems
Detritivores are organisms that feed on dead organic material, particularly plant detritus. They play a crucial role in decomposition and nutrient cycling by breaking down organic matter and returning nutrients to the soil or water column.
Examples of Detritivores
Earthworms are detritivores. They consume dead plant material and other organic matter, breaking it down as they move through the soil, which helps with decomposition and soil structure.
Jellyfish are not detritivores. They are typically carnivorous, feeding on small fish, zooplankton, and other marine organisms. They capture their prey using their tentacles.
Millipedes are detritivores. They feed on decaying leaves and other dead plant matter, contributing to the decomposition process.
Seahorses are not detritivores. They are carnivorous and feed primarily on small crustaceans like shrimp and other small marine organisms, which they suck in through their snouts.
Woodlice, also known as pill bugs or roly-polies, are detritivores. They feed on dead plant material and play a role in breaking down organic matter.
Given this information, the correct answer is “1, 3 and 5 only,” as earthworms, millipedes, and woodlice are detritivores, while jellyfish and seahorses are not.
