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Plant Kingdom Test - 40

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Plant Kingdom Test - 40
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The plant alternation of generations is characterized by .......... meiosis.
    Solution
    Alteration of generations is a process of alteration of haploid and diploid generations in the plant life cycle. It occurs by production of spores and thus, sporic meiosis controls this process. 
    The correct answer is 'sporic'.

  • Question 2
    1 / -0
    Mosses and ferns are found in moist and shady places because both
    Solution
    Mosses and ferns are called the amphibians of plants which are land plants but require a film of water for antherozoids to reach archegonium.
  • Question 3
    1 / -0
     Marsilea belongs
    Solution
    The correct answer is 'Pteropsida'
    Marsilea is a genus of aquatic ferns belonging to class Pteropsida as the plant body contains only a rhizome and shoot which are the characteristic features of class Pteropsida.
  • Question 4
    1 / -0
    Funaria and Marchantia are examples of:
    Solution
    • Bryophytes are small, non-vascular plants lacking true roots, stems, and leaves. The plant body may be thalloid or erect. Mosses, liverworts, and hornworts are bryophytes.
    • Marchantia is a bryophyte. It is a type of liverwort. The plant body is thalloid, with root-like structures called rhizoids on the undersurface.
    • Funaria is a genus of moss. It has no vascular system. Spirally arranged leaf-like structures are found. Root-like structures called rhizoids are present.
    • Thallophyta includes simple plants without roots, stems, and leaves. 
    • Pteridophytes are vascular plants with true roots, stems, and leaves. 
    • Phanerogams are plants with distinct reproductive organs. These include seed-bearing plants (gymnosperms and angiosperms). 
    • Hence, the correct answer is option B. 
  • Question 5
    1 / -0
    In Ulothrix, meiosis takes place in 
    Solution
    Ulothrix being an haploid organism, shows zygotic meiosis. Zygote is the only diploid structure which undergoes meiosis to form four haploid quadriflagellate zoospores. Each zoospore develops into a new Ulothrix thallus.
    So, the correct answer is 'Zygote'
  • Question 6
    1 / -0
    First vascular plant is
    Solution
    • Pteridophytes are also called first vascular cryptogams or spore-bearing vascular plants. 
    • Vascular plants contain conducting system for the transport of water, minerals, and food materials like xylem and phloem tissues in plants. 
    • They include angiosperms and gymnosperms and plants that reproduce by spores—the ferns and other so-called lower vascular plants. The pteridophytes represent the oldest vascular plants. 
    • Thus, the correct answer is ‘Pteridophyta.’
  • Question 7
    1 / -0
    Agar-agar is produced by
    Solution
    Agar- Agar is a jelly ike substance, obtained from algae. Agar forms the supporting structure in the cell  walls of certain species of algae, which is released on boiling. These algae are known as agarophytes. Agar can be used as a laxative, an appetite suppressant, a vegetarian substitute for gelatin, a thickener for soups , in fruit preserves and  ice creams, as a clarifying agent in brewing,culture media for microbiologial work etc.
    Algae is the division of the lower plant which contain chlorophyll in the cell.  They are divided broadly as macro- algae ( macroscopic algae ) and micro-algae ( microscopic algae). They have multiple uses.
    Option B is correct.
  • Question 8
    1 / -0
    Trichodesmium erythraeum which gives colour to red sea is a
    Solution
    The Red Sea is named for an occasional bloom of the cyanobacteria, Trichodesmium erythraeum algae, which accumulates and muddies the usually translucent blue-green waters. These cyanobacteria appear as red and pinkish blankets on the surface of these waters. After blooming, the Trichodesmium erythraeum die, and they turn the sea reddish-brown. The appearance of a body of water changes drastically during a "bloom" of cyanobacteria.
  • Question 9
    1 / -0
    Agar-agar is obtained from
    Solution
    Correct Answer- D 
    Explanation-

    Agar-agar is a gelling agent with unbranched polysaccharides and is used in microbiology as a solidifying agent of liquid culture mediums. It is extracted from the cell wall of red algae, mostly from Gelidium sp. and Gracilaria sp.
  • Question 10
    1 / -0
    Which of the followings is most primitive division?
    Solution
    Psilopsida are considered as the primitive group. The sporophyte is comprised of the rhizome, aerial branches and small outgrowths. The vascular system is not developed properly. The rhizome is branched and performs the function of root and the outgrowths on stem perform function of photosynthesis. There are sporangia on the stem which produce the spores. Most of these plants are extinct.
    Thus, the correct answer is option C. 
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