Which one of the following is a filter feeder?
Show answer
Answer: C. A filter feeder strains food particles from water. Oysters pump water through their gills and filter out plankton and particles. The others catch prey actively.
Watch for: Pelicans scoop water but they catch fish, not filter tiny particles.
Why the other options are wrong
- A. Wrong because catfish are bottom feeders, not filter feeders.
- B. Wrong because octopus is a predator that hunts prey.
- D. Wrong because pelicans scoop and swallow fish.
Source to check: NCERT Class 11 Biology, Chapter 4 Animal Kingdom (Mollusca)
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.