2013 · EnvironmentPrevious Year Question
Q3.
With reference to the food chains in ecosystems, which of the following kinds of organism is/are known as decomposer organism/organisms? 1. Virus 2. Fungi 3. Bacteria Select the correct answer using the codes given below:
A. 1 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3
Answer

B

Explanation

Most viruses need a living host organism — they are more like a parasite. Viruses reproduce by injecting DNA into living cells. They are not used in decomposition. Fungi and Bacteria are the true decomposers.