Here is Question No. 66 a part of our series on UPSC Prelims 2021.
Q66. Which one of the following is a filter feeder?
a) Catfish
b) Octopus
c) Oyster
d) Pelican
Answer: (c)
- Statement 3 is correct. Oysters are small organisms, found cemented to rocks or other hard substrates. Oysters are filter feeders, which means they consume food by moving a lot of water through their bodies. The beating of cilia pumps water through the oyster’s gills. Plankton, algae, and other particles get caught in the gill mucus. These particles are subsequently carried to the oyster’s mouth and esophagus where they are consumed before being taken to the stomach where they are digested
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