PLANT KINGDOM

 

 PLANT KINGDOM • Bryophytes • Pteridophytes • Gymnosperms • Angiosperms. • Algae

Phylogenetic classification systems based on evolutionary relationships between the various organisms are acceptable. This...

The algae reproduce by vegetative, asexual and sexual methods. Vegetative reproduction is by fragmentation. Each fragment ...

Economic Importance Many species of Porphyra, Laminaria and Sargassum are among the 70 species of marine algae used as foo...

Chlorophyceae The members of chlorophyceae are commonly called green algae. The plant body may be unicellular, colonial or...

Phaeophyceae The members of phaeophyceae or brown algae are found primarily in marine habitats. They show great variation ...

Rhodophyceae The members of rhodophyceae are commonly called red algae because of the predominance of the red pigment, r-p...

BRYOPHYTES Bryophytes include the various mosses and liverworts that are found commonly growing in moist shaded areas in t...

It produces gametes, hence is called a gametophyte. The sex organs in bryophytes are multicellular. The male sex organ is ...

Liverworts The liverworts grow usually in moist, shady habitats such as banks of streams, marshy ground, damp soil, bark o...

Mosses The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. The first stage ...

PTERIDOPHYTES They are the first terrestrial plants to possess vascular tissues – xylem and phloem.The pteridophytes are f...

The gametophytes bear male and female sex organs called antheridia and archegonia, respectively.Water is required for tran...

GYMNOSPERMS The gymnosperms (gymnos : naked, sperma : seeds) are plants in which the ovules are not enclosed by any ovary ...

The gymnosperms are heterosporous; they produce haploid microspores and megaspores. The two kinds of spores are produced w...

ANGIOSPERMS Unlike the gymnosperms where the ovules are naked, in the angiosperms or flowering plants, the pollen grains a...

The male sex organ in a flower is the stamen. Each stamen consists of a slender filament with an anther at the tip. The an...

The pollen grains germinate on the stigma and the resulting pollen tubes grow through the tissues of stigma and style and ...

Sporophytic generation is represented only by the one-celled zygote. There are no free-living sporophytes. Meiosis in the ...

On the other extreme, is the type wherein the diploid sporophyte is the dominant, photosynthetic, independent phase of the...


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