MCQ
Bryophytes are amphibians because:
- AThey require a layer of water for carrying out sexual reproduction.
- BThey occur in damp places.
- CThey are mostly aquatic.
- DAll of the above.
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$X-Y-Z$
$R$ : Ionic channels are absent in the area covered by myelin sheath therefore, depolarization occurs only at the nodes of Ranvier, resulting in saltatory or jumping conduction.