The Question is from neet-botany biological-classification , and it was created by the author Mr. NARESH KUMAR K

Question

In a lichen, the fungal partner primarily provides:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Symbiotic relationships in lichens
 **Related Topics**: Mycology, Botany, Symbiosis
 **Prerequisites**: Understanding of fungal and algal characteristics and symbiotic relationships.
## SOLUTION PATHWAY
**Given Information**:
The question asks about the primary contribution of the fungal partner in a lichen.
**Method & Steps**:
1. Understanding lichen structure: Lichens are composite organisms consisting of a fungus (mycobiont) and an alga or cyanobacterium (photobiont) living in a symbiotic relationship.
  Reasoning: The fungus provides structure and protection to the algae.
  Formula/Rule: N/A
2. Analyzing fungal contributions: The fungus provides a stable environment for the algae, protecting it from harsh conditions like desiccation and excessive sunlight.
  Working: The fungal hyphae form a protective layer around the algal cells.
  Key Point: The fungus does not directly provide food through photosynthesis; that's the role of the algae.
3. Determining the primary role: The structural support and protection offered by the fungus are crucial for the lichen's survival.
  Result: The fungal partner primarily provides structure and protection.
  Verification: This aligns with the understanding of lichen biology and the symbiotic relationship between the fungus and algae.
## OPTION ANALYSIS
A :x: Food through photosynthesis: Photosynthesis is carried out by the algal partner (photobiont), not the fungus.
B ✓: Structure and protection: The fungus provides a protective structure and holds the algae in place.
C :x: Nitrogen fixation: While some lichens can fix nitrogen, this is primarily done by the cyanobacterial photobiont, not the fungus's main contribution.
D :x: Water absorption: Both partners contribute to water absorption, but the fungus's main role is structural support and protection.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the roles of the fungus and alga: Remember the fungus provides structure, the alga provides food.
  2.Overemphasizing nitrogen fixation: While important in some lichens, it's not the primary contribution of the fungal partner.
 **Quick Tips**:
  1.Visualize the lichen structure: Imagine the fungus as a protective shell around the photosynthetic algae.
  2.Remember the key terms: Mycobiont (fungus) and photobiont (algae)

Mr. NARESH KUMAR K · Answer

Food through photosynthesis

Mr. NARESH KUMAR K · Answer

The correct Option is "Structure and protection"

Mr. NARESH KUMAR K · Answer

Nitrogen fixation

Mr. NARESH KUMAR K · Answer

Water absorption

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