Identify the pair of heterosporous pteridophytes among the following:
Identify the pair of heterosporous pteridophytes among the following:
Selaginella and Salvinia
Psilotum and Salvinia
Equisetum and Salvinia
Lycopodium and Selaginella
The Correct Option is A
Solution and Explanation
Heterospory involves the creation of spores in two distinct sizes and developmental trajectories: smaller ones known as microspores with a male role, and larger ones referred to as megaspores with a female role. This phenomenon, which is pivotal in the evolution of vascular plants, has ultimately paved the way for the emergence of seeds. Examples of plants showcasing heterospory include Selaginella, Salvinia, Azolla, and others.
Therefore, The correct option is (A): Selaginella and Salvinia
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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:
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