Question

which stem jointed in lycopdida ,psilopsida,sphinopsida,pteropsida​

Answer 1

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!

Answer 2

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.