Question

classification of plants​

Answer 1

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Answer 2

kingdom:- plant

Division Thallophyta

These are the lowermost plants of the plant kingdom, without a well-differentiated body design. This means that the plant body is not differentiated as roots, stem, and leaves. They are commonly called algae, are permanently aquatic. Examples include Spirogyra, Chara, and Ulothrix.

Division Bryophyta

These are small terrestrial plants. They show differentiation in the body design, with stem, leaf-like structures, and root-like structures. But, they do not have any specialized tissue to conduct water and other substances. They live in damp and sandy habitats and are often referred to as the amphibians of the plant kingdom. Examples are Riccia, Funaria, and Marchantia

Division Pteridophyta

These are supposed to be the oldest vascular plants. The plant body is differentiated into roots, stem, and leaves, apart from having a specialized tissue for conduction. This tissue helps in the conduction of water and other substances from part of the plant to the other.

These plants have naked embryos called spores. The reproductive organs in these plants are inconspicuous. Examples: Marselia, Ferns.

Division Phanerogamae

Phanerogams are seed-bearing plants. The plant body is well differentiated with stem, leaves, and roots. There are well differentiated reproductive tissues that produce seeds. These plants also have a well-developed vascular system.

Depending on whether the seeds produced are naked or whether they are enclosed, phanerogams are further classified into two subdivisions. They are Gymnosperms and Angiosperms

Gymnosperms

Gymnosperms are plants with naked seeds. There are about 650 living species of gymnosperm plants. The plants are usually perineal, evergreen and woody.

They have a well-developed vascular tissue but do not have vessels. The reproductive organs generally form cones or strobilus. There is no fruit formation and the seeds are hence said to be naked. Examples: Cycas, Pinus, Deodar

Angiosperms

Angiosperms are seed-bearing plants. Seeds develop inside tissues that get modified to form the fruit of the plant. Also called the flowering plants, they are found abundantly in nature. These plants are usually terrestrial and they may be annual, biennial or perennial. The vascular system is very well developed with xylem and phloem. Angiosperms also show the feature of double fertilization. Examples: Mustard plant, Pea plant.

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