which stem jointed in lycopdida ,psilopsida,sphinopsida,pteropsida
Answers
Answer : Sphenopsida
Explanation : Classification of Pteridophytes :-
1. Psilopsida :-
a. Most ancient vascular plants.
b. Plant Body is divided into :-
› Roots → Rhizoids
› Stems → Rhizomes
› Leaves → Scaly → Cataphylls
Examples : Psilotum, Horneophyton, etc.
2. Lycopsida :-
a. Club mosses.
b. Plant body is divided into :-
› Roots → Adventitious
› Stems → Rhizomes
› Leaves → Uniribbed → Microphylls
Examples : Lepidodendron ( giant club moss ), Selaginella ( little club moss ), etc.
3. Sphenopsida :-
a. Horse tail.
b. Plant body is dividing into :-
› Roots → Nodulated
› Stems → Rhizomes
› Leaves → Scaly → Sporophylls
Examples : Equisetum, Spenophylla, etc.
4. Pteropsida :-
a. True Ferns.
b. Plant body is divided into :-
› Stems → Young ramenta
› Leaves → Multinerved → Megaphylls
Examples : Osmuda ( royal fern ), Adiantum ( walking fern ), etc.
Hope it helps!
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Question :
Which stem jointed ?
a) Lycopdida.
b) Psilopsida.
c) Sphinopsida.
d) Pteropsida.
Answer :
Sphenopsida .
Explanation :
Classification of Pteridophytes :-
1. Psilopsida :-
a. Most ancient vascular plants.
b. Plant Body is divided into :-
› Roots → Rhizoids
› Stems → Rhizomes
› Leaves → Scaly → Cataphylls
Examples : Psilotum, Horneophyton, etc.
2. Lycopsida :-
a. Club mosses.
b. Plant body is divided into :-
› Roots → Adventitious
› Stems → Rhizomes
› Leaves → Uniribbed → Microphylls
Examples : Lepidodendron ( giant club moss ), Selaginella ( little club moss ), etc.
3. Sphenopsida :-
a. Horse tail.
b. Plant body is dividing into :-
› Roots → Nodulated
› Stems → Rhizomes
› Leaves → Scaly → Sporophylls
Examples : Equisetum, Spenophylla, etc.
4. Pteropsida :-
a. True Ferns.
b. Plant body is divided into :-
› Stems → Young ramenta
› Leaves → Multinerved → Megaphylls
Examples : Osmuda ( royal fern ), Adiantum ( walking fern ), etc.
Diagram : Refer to the attachment.
Thank you.
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