Consider the following kinds of organisms :
- 1.Copepods
- 2.Cyanobacteria
- 3.Diatoms
- 4.Foraminifera
Which of the above are primary producers in the food chains of oceans?
Show answer
Answer: B. Primary producers make food by photosynthesis. Cyanobacteria and diatoms are photosynthetic plankton, so they are primary producers in oceans. Copepods are tiny animals that eat plankton, and foraminifera are mostly consumers. So 2 and 3.
Watch for: All four are tiny ocean plankton; only those doing photosynthesis are producers.
Why the other options are wrong
- A. Wrong because copepods are consumers, not producers.
- C. Wrong because foraminifera are mainly consumers.
- D. Wrong because copepods and foraminifera are consumers.
Source to check: NCERT Class 11 Biology, Chapter 2 Biological Classification; NCERT Class 12 Biology, Ecosystem chapter
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.