[Solved] 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 ?

Q22. 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 ?

A. 1 and 2

B. 2 and 3

C. 3 and 4

D. 1 and 4

Answer: B

Explanation:

· Copepods are a group of small crustaceans found in nearly every freshwater and saltwater habitat.

· Copepods are major secondary producers in the World Ocean.

· They are an important source of food for many fish species but also a significant producer of detritus.

· Cyanobacteria, also called bluegreen algae, are microscopic organisms found naturally in all types of water.

· Cyanobacteria are important primary producers and form a part of the phytoplankton.

· Diatoms are photosynthesising algae, they have a siliceous skeleton (frustule) and are found in almost every aquatic environment including fresh and marine waters.

· Foraminifera are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses.