Question:
Vesicular arbuscular mycorrhiza are
Vesicular arbuscular mycorrhiza are
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VAM:
- Obligate symbionts.
- Form mutualistic association with roots.
- Enhance phosphorus uptake.
- Obligate symbionts.
- Form mutualistic association with roots.
- Enhance phosphorus uptake.
Updated On: Sep 1, 2026
- Free living organisms
- Obligate symbiont
- Facultative symbiont
- Obligate parasite
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of mycorrhizal associations and their classification.
Step 2: Detailed Explanation:
Vesicular arbuscular mycorrhiza (VAM) are obligate symbionts.
They cannot survive without a host plant because they are dependent on the host for carbohydrates.
They form a mutualistic association with plant roots.
Free living organisms (A): Incorrect, they require a host.
Facultative symbiont (C): Incorrect, they cannot live independently.
Obligate parasite (D): Incorrect, they do not harm the host.
Thus, VAM are obligate symbionts.
Step 3: Final Answer:
Thus, vesicular arbuscular mycorrhiza are obligate symbionts, which corresponds to option (B).
[0.5cm]
This question tests knowledge of mycorrhizal associations and their classification.
Step 2: Detailed Explanation:
Vesicular arbuscular mycorrhiza (VAM) are obligate symbionts.
They cannot survive without a host plant because they are dependent on the host for carbohydrates.
They form a mutualistic association with plant roots.
Free living organisms (A): Incorrect, they require a host.
Facultative symbiont (C): Incorrect, they cannot live independently.
Obligate parasite (D): Incorrect, they do not harm the host.
Thus, VAM are obligate symbionts.
Step 3: Final Answer:
Thus, vesicular arbuscular mycorrhiza are obligate symbionts, which corresponds to option (B).
[0.5cm]
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