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?
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?
Answer:
(b)
Core Books/NCERT
Cyanobacteria, also called blue-green algae, are microscopic organisms found naturally in all freshwater ecosystems. These single-celled organisms use sunlight to make their own food. They are said to be the primary producer as they produce food for higher levels of organisms. Hence, 2 is correct. Diatoms are a major group of algae, specifically microalgae, found in the oceans, waterways and soils of the world. They are one of the major primary producers in the ocean, responsible annually for ~20% of photosynthetically fixed CO2 on Earth. Hence, 3 is correct.