Question

how are pteridophytes classified?​

Answer 1

Explanation:

आई होप दिस आंसर वेरी वेल

Answer 2

Pteridophyta

Before the flowering plants, the landscape was dominated with plants that looked like ferns for hundreds of millions of years. Pteridophytes show many characteristics of their ancestors. Unlike most other members of the Plant Kingdom, pteridophytes don’t reproduce through seeds, they reproduce through spores instead.

Pteridophyta Classification

Pteridophyta is classified into four main classes:

Psilopsida

• They are the most primitive.

• The stem is photosynthetic and dichotomously branched.

• Rhizoids are present.

• Leaves are mostly absent.

• The sporophyte is homosporous synangium.

• Examples- Psilotum and Tmesipteris.

Lycopsida

• They are commonly known as club moss.

• Well-differentiated plant body with adventitious root, stem, rhizophores and leaves.

• The sporophyte is homosporous or heterosporous.

• Examples- Selaginella, Lycopodium.

Sphenopsida

• Commonly known as horsetail.

• Well-differentiated plant body with roots arising from nodes of the underground rhizome, stem and scaly leaves.

• Homosporous, sporangia are borne on strobili.

• Examples- Equisetum.

Pteropsida

• Commonly known as a fern.

• Well-differentiated plant body with roots, stem and leaves.

• The sporophyte is homosporous or heterosporous.

• Antherozoids are multiflagellate.

• Examples- Pteris, Dryopteris, Adiantum