Tag: cryptogams
Questions Related to cryptogams
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia, and Aconitum?
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All are ornamental plants.
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All are phylogenic link species.
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All are prone to over exploitation.
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All are exclusively present in the Eastern Himalayas.
Nepenthes is also known as the pitcher plant. It is an insectivorous plant. Psilotum is a pteridophyte and it is used for medicinal purpose. Aconitum is a medicinal plant. Rauwolfia is also a medicinal plant.
In ________, a dominant and independent diploid sporophyte alternates with a short-lived, independent haploid gametophyte.
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algae
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bryophytes
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pteridophytes
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gymnosperms
ln pteridophytes, the diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body. It alternates with multicellular, saprophytic autotrophic, independent but short-lived haploid gametophyte.
Cryptogamic plants are
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Seedless
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Embryoless
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Leafless
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Rootless
The cryptogams are flowerless and seedless plants. They are simple plants including Algae, Mosses and Ferns. They do not produce flowers, fruits and seeds. Cryptogams are considered as lower plants.
Which of the following is called as club moss?
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Pteris
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Lycopodium
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Equisetum
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Marsilea
Which of the following was not flourishing in Jurassic period?
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Herbaceous lycopods
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Sphenopsida
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Ferns
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Conifers
Pteridophytes differ from thallophytes and bryophytes in having
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Highly differentiated plant body
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True roots, stem and leaves
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Well defined vascular system
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All of the above
The body of pteridophytes is differentiated into true stem, leaves and roots like higher plants. They possess well-developed vascular tissues like xylem and phloem for conduction of water and other substances from one part of plant body to another. While the body of thallophytes and bryophytes are not differentiated and lacks vascular system.
Most advanced gymnosperm belongs to
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Cycadales
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Coniferales
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Gnetales
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Cycadofillicales
The Gnetophyta are a small group of vascular seed plants belonging to the phylum Gnetophyta.
The Gnetophyta include only three genera, Ephedra, Gnetum, and Welwitschia, each of which belongs to a separate family, in a single order, called as the Gnetales.
Which of the following is not extinct?
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Pelycosaurs.
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Therapsids.
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Thecodont reptiles.
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Sphenopsida.
Which one of the following is a correct statement?
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Pteridophyte gametophyte has a protonemal and leafy stage.
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In gymnosperms, female gametophyte is free-living
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Antheridiophores and archegoniophores are present in pteridophytes.
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Origin of seed habit can be traced in pteridophytes.
Bryophytes are an informal group consisting of three divisions of non-vascular land plants: the liverworts, hornworts and mosses. They are characteristically limited in size and prefer moist habitats although they can survive in drier environments. A bryophyte spore germinates and produces an often algal-like mat, called a protonema (plural protonemata) and the leafy or thalloid stage of the gametophyte develops from the protonemal stage. The protonemata are almost always ephemeral but there are exceptions. Amongst the mosses there is a small number of species in which the protonemata are persistent and the leafy plants are ephemeral. The spore was haploid and so are the resulting protonema and the ensuing leafy or thalloid stages.
Multi ciliated antherozoids occur in _________.
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Riccia and Funaria
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Pteris and Cycas
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Pteris and Funaria
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Marchantia and Riccia