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Organisms which participate most activel...

Organisms which participate most actively in nitrogen cycle in nature are
Saprophytic angiosperms
Parasitic fungi
Bacteria
Cereals.

A

Saprophytic angiosperms

B

Parasitic fungi

C

Bacteria

D

Cereals.

Text Solution

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The correct Answer is:
To solve the question regarding which organisms participate most actively in the nitrogen cycle, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Nitrogen Cycle**: The nitrogen cycle is a natural process that involves the conversion of nitrogen from the atmosphere into forms usable by living organisms. This cycle includes several key processes: nitrogen fixation, nitrification, denitrification, and ammonification. 2. **Identify Key Processes**: Focus on nitrogen fixation, which is the process that converts atmospheric nitrogen (N2) into ammonia (NH3) or related compounds. This is crucial because most organisms cannot use atmospheric nitrogen directly. 3. **Recognize the Role of Microorganisms**: Biological nitrogen fixation is primarily carried out by certain microorganisms, particularly bacteria. These bacteria can convert nitrogen gas into forms that plants can absorb and utilize. 4. **Evaluate the Options**: - **Saprophytic angiosperms**: These are flowering plants that decompose organic matter but do not play a direct role in nitrogen fixation. - **Parasitic fungi**: These fungi obtain nutrients from living hosts but are not involved in nitrogen fixation. - **Bacteria**: Certain bacteria, such as Rhizobium, Nitrosomonas, and Nitrobacter, are essential for nitrogen fixation and play a significant role in the nitrogen cycle. - **Cereals**: These are plants that absorb nitrogen but do not fix atmospheric nitrogen themselves. 5. **Select the Correct Answer**: Based on the evaluation, the organisms that participate most actively in the nitrogen cycle are bacteria. Therefore, the correct answer is **C) Bacteria**. ### Final Answer: C) Bacteria
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