Tag: kingdom plantae
Questions Related to kingdom plantae
The characters of thallophyta is/are
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Plant body is thallus.
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Non-vascular plant.
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Sex organs are unicellular and without jacket of sterile cell.
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All of the above.
Thallophytes lack differentiation of plant body into the stem and leaves. The plant body is called as a thallus. They lack vascular tissue, the sex organs are unicellular and when multicellular, all are fertile. Thus, the correct answer is option D.
The name 'Thallophyta' was coined by
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Endlicher
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Linneaus
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Christenson
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Hackel
The term Thallophyta was coined by Endlicher. The organisms included in Thallophyta are algae, fungi, slime mould and bacteria.
Linneaus gave biological classification.
Hackel contributed in the history of evolutionary theory. He proposed a link between ontogeny and phylogeny.
Christensen contributed in physics in diagnostic radiology.
Plants without well differentiated stem, root and leaf are kept in
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Thallophyta
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Angiosperm
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Pteridophyta
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Gymnosperm
Life cycle is haplontic in
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Funaria
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Ulothrix
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Selaginella
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Pinus
The chloroplast in Ulothrix is
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Spiral
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Laminate
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Star shaped
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Girdle shaped
Which of the following is the principal pigment of Phaeophyceae?
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Phycocyanin
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Phycoerythrin
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Fucoxanthin
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Chlorophyll
Fucoxanthin is a xanthophyll, with formula CHO. It is found as an accessory pigment in the chloroplasts of brown algae and most other heterokonts, giving them a brown or olive-green color. It is the principal pigment of Phaeophyceae.
Phycocyanin is a pigment-protein complex from the light-harvesting phycobiliprotein family, along with allophycocyanin and phycoerythrin. It is an accessory pigment to chlorophyll. All phycobiliproteins are water-soluble, so they cannot exist within the membrane-like carotenoids.
Spirogyra is commonly called as pond silk because
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Silk is manufactured from it
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It looks like a thread
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It is slimy to touch
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All of the above
Pond silk is the common name of Spirogyra (algae) because it is very slimy.
Spirogyra is a genus (about 400 species) of freshwater green algae which are found in shallow ponds, ditches and amongst vegetation at the edges of large lakes, generally growing free-floating.
Cells are joined end-to-end in an unbranched, largely unspecialised, stiff filament and are cylindrical with one or two spirally-wound chloroplasts on which many pyrenoids are borne. The cell wall is of two layers, the outer of cellulose and the inner of pectin. Filaments can be several centimeters in length. It generally has a rather silky feel and a shiny green colour.
Plants with hidden reproductive organ are called as
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Gymnosperms
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Cryptogamae
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Phanerogams
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All of the above
Cryptogamae means hidden reproduction, referring to the fact that no seed is produced, thus cryptogams represent the non-seed bearing plants. A cryptogam is a plant that reproduces by spores, without flowers or seeds.
In Ulothrix, meiosis takes place in
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Cells of the filament
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Holdfast
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Zygote
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Zoospores
Ulothrix being an haploid organism, shows zygotic meiosis. Zygote is the only diploid structure which undergoes meiosis to form four cells. Each develops into Ulothrix.
Which of the following is an example of division Thallophyta?
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Ulothrix
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Funaria
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Riccia
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Adiantum
Ulothrix is an example of division Thallophyta, while Funaria and Riccia are example of Bryophyta and Adiantum is an example of Pteridophyta.