MCQ
Majority of sponges are
- ✓Asymmetrical
- BRadially symmetrical
- CSpherically symmetrical
- DBilaterally symmetrical
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$R$ : 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.
$II.$ Chemical theory of origin of life was given by $....B......$
Reason : Flower colour gene shows incomplete dominance.