Lichens are unique, double organisms that consist of two unrelated components, an alga and/ or cyanobacterium (photobiont) and a fungus (mycobiont). Lichens are unique, double organisms that consist of two unrelated components, an alga and/or cyanobacterium (photobiont) and a fungus (mycobiont) Related Theory Lichens have a body called a thallus, an outer, tightly packed fungal layer called a cortex, and an inner, loosely packed fungal layer called a medulla. Lichens use hyphal bundles called rhizines to attach to the substrate.
There exists a close association between the alga and the fungus within a lichen. The fungus:
NEET UG 2005 — Zoology Organisms and Populations
2005mcqmedium
There exists a close association between the alga and the fungus within a lichen. The fungus:
Official previous-year question
Held on 30 Apr 2005 · Verified 9 Jul 2026.
Options
- A
provides protection, anchorage and absorption for the algae
- B
provides food for the alga
- C
fixes the atmospheric nitrogen for the alga
- D
releases oxygen for the alga.
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