Question:
In fern plant, the ejection of spores with force is achieved by the:
In fern plant, the ejection of spores with force is achieved by the:
Updated On: Sep 3, 2024
- sporangiophore
- annulus
- stomium
- indusium
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The Correct Option is B
Solution and Explanation
In annulus, due to presence of thickening along the radial and inner tangential walls, their upper walls contract and the inner ones straight, and annulus coils which exerts pressure on the wall resulting in breaking of the capsule between the cells of stomium thereby releasing the spores.
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Concepts Used:
Pteridophytes
Pteridophytes are the first terrestrial vascular plants. Carolus Linnaeus classified them under the group cryptogamae. Pteridophytes occupy a transitional position between bryophytes and spermatophytes.
For Example, Silver fern, Equisetum, Selaginella
The general characteristics of Pteridophytes are:
- They are seedless.
- They are multicellular.
- They reproduce through spores.
- They are independent and free-living organisms.
- They have a well-differentiated plant body into root, stem and leaves.
Classification of Pteridophytes:
Life Cycle of Pteridophyta:
