Consider the following micro organisms 1 Bacteria 2 Fungi 3 Protozoans 4 Virus Which of the above mi...........

Environment and Ecology Biodiversity

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Consider the following micro-organisms:

1. Bacteria

2. Fungi

3. Protozoans

4. Virus

Which of the above micro-organisms contribute in soil development?

1 and 2 Only

1,2 and 4 Only

1,2 and 3 Only

All of the above

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Explanation:

Micro-organisms are responsible for an estimated three quarters of a soil's metabolic activity. These micro-organisms help release nutrients from dead organisms. Algae, fungi, protozoans, actinomycetes and other miniscule organisms play a role in soil development. Virus do not play a direct role in soil development as they need a host for growth and survival.