MCQ
A fern differs from a moss in having
- ASwimming archegonia
- BSwimming antherozoids
- CIndependent gametophytes
- ✓Independent sporophytes
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$I.$ Double layered
$II.$ Fluid contained in it reduces the friction on the lung surface
$III.$ Its outer layer is in contact with thoracic wall
$IV.$ Its inner layer is in contact with lungs