Month: April 2020

Summary of Plant Kingdom

Summary of Plant Kingdom :- Plant kingdom includes algae, bryophytes, pteridophytes, gymnosperms and angiosperms. Algae are chlorophyll-bearing simple, thalloid, autotrophic and largely aquatic organisms. counting on the type of pigment possesed and consequently the type of stored food, algae are classfied into three classes, particularly Chlorophyceae, Phaeophyceae and Rhodophyceae. Algae commonly reproduce vegetatively by means …

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Plant Life Cycles and Alternation of Generations

Plant Life Cycles and Alternation of Generations :- In flora, each haploid and diploid cells can divide by using mitosis. This capacity results inside the formation of numerous plant bodies – haploid and diploid. The haploid plant body produces gametes by means of mitosis. This plant body represents a gametophyte. Following fertilisation the zygote additionally …

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Angiosperms

Unlike the gymnosperms wherein the ovules are naked, within the angiosperms or flowering vegetation, the pollen grains and ovules are developed in specialised structures known as vegetation. In angiosperms, the seeds are enclosed in fruits. The angiosperms are an exceptionally large group of plant life happening in wide selection of habitats. they range in size …

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Gymnosperms

The gymnosperms (gymnos : naked, sperma : seeds) are plants throughout which the ovules aren’t enclosed by way of any ovary wall and continue to be exposed, both earlier than and after fertilisation. The seeds that increase post-fertilisation, are not covered, i.E., are naked. Gymnosperms include medium-sized trees or tall bushes and shrubs (Figure 3.4). …

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Pteridophytes

The Pteridophytes consist of horsetails and ferns. Pteridophytes are used for medicinal functions and as soil-binders. they’re also often grown as ornamentals. Evolutionarily, they’re the primary terrestrial flowers to possess vascular tissues – xylem and phloem. You shall look at greater approximately these tissues in Chapter 6. The pteridophytes are located in cool, damp, shady …

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Mosses

Mosses :- The important stage of the lifestyles cycle of a moss is that the gametophyte which includes two stages. The number one degree is that the protonema degree, which develops directly from a spore. it’s a creeping, green, branched and often filamentous level. The 2d level is that the leafy stage, which develops from …

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Liverworts

The liverworts grow commonly in moist, shady habitats like banks of streams, marshy ground, damp soil, bark of bushes and deep inside the woods. The plant frame of a liverwort is thalloid, e.G., Marchantia. The thallus is dorsiventral and carefully appressed to the substrate. The leafy individuals have tiny leaf-like appendages in rows on the …

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Rhodophyceae

The individuals of rhodophyceae are commonly called alga because of the predominance of the crimson pigment, r-phycoerythrin in their frame. Majority of the alga are marine with greater concentrations found inside the hotter areas. They arise in both well-lighted regions on the point of the floor of water and also at wonderful depths in oceans …

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Phaeophyceae

The members of phaeophyceae or alga are discovered in general in marine habitats. They show brilliant version in length and form. They range from easy branched, filamentous forms (Ectocarpus) to profusely branched bureaucracy as represented via kelps, which can reach a peak of one hundred metres. They possess chlorophyll a, c, carotenoids and xanthophylls. They …

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Chlorophyceae

The members of chlorophyceae are normally known as chlorophyte . The plant body may also be unicellular, colonial or filamentous. they may be usually grass green thanks to the dominance of pigments chlorophyll and b. The pigments are localised in specific chloroplasts. The chloroplasts could also be discoid, plate-like, reticulate, cup-fashioned, spiral or ribbon-shaped in …

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