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Plant Kingdom Test - 61

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Plant Kingdom Test - 61
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Development of microsporangium in angiosperms and gymnosperms is of__________.
  • Question 2
    1 / -0
    Monoecious plant of Chara shows occurrence of
    Solution
    Chara is a genus of green algae. They are multicellular and superficially resemble land plants. They prefer less oxygenated and hard water. They are covered with calcium carbonate deposits and are commonly known as stoneworts.
    Chara reproduces by both sexual and vegetative modes. Sexual reproduction of Chara is an advanced oogamous type. The sex organs are macroscopic and large. The male sex organ is yellow to red in colour, called globule. The female sex organ is more or less oval and green in colour and called nucule or oogonium. On maturity, globule develops into antheridia filaments made up of antheridium cells. Oogonium is always situated singly above the globule or antheridium.
    Most of the species are homothallic or monoecious ( i.e. male and female sex organs develop on the same plant ) but some are heterothallic or dioecious ( i.e. male and female sex organs on different plants ).
    Thus, the correct answer is option A.
  • Question 3
    1 / -0
     Agar-agar, Carrageenin and Funori are obtained from
    Solution
    Cell well composition of algae is known as phycocolloids. Phycocolloids of red algae are agar-agar, carreigeenin, and funori. Red algae are also known as Kanten. Agar-agar is obtained from seaweed, the cell wall of Gracllaria and Geladium used as culture media in the laboratory. Carrageenin is a multifunctional agent. It is used as a clearing agent and emulsifier in chocolate ice cream, shaving cream, toothpaste, and paints. Funori is the glue which is used as adhesive and in sizing textiles paper.
    Hence correct answer is option A.                            
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  • Question 4
    1 / -0
    Peat moss is 
    Solution
    Correct option: A
    Explanation: 
    • Sphagnum is the biological name of peat moss.

    • Sphagnum when dead and dried can be used for improving fertilising power of soil as they have excellent water holding capacity.
    • Therefore, it is also known as peat moss.

  • Question 5
    1 / -0
    What are chromosome number in the following respectively (i) Synergid of Gossypium (ii) Leaf cells in Allium (iii) Endosperm of Saccharum.
  • Question 6
    1 / -0
    This provides brown colour to algae 
    Solution
    Fucoxanthin is a xanthophyll pigment. It is an accessory pigment in the chloroplasts of brown algae. It gives characteristic brown color to algae.
    Thus, the correct answer is option C.
  • Question 7
    1 / -0
    Which of the following statements is wrong?
    Solution

    Correct Option: C

    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 species and Gracilaria species.
    • Laminaria and Sargassum are the brown algae and are cultivated as a crop. 
    • Algae are green photosynthetic organisms that release oxygen in immediate vicinity through the process of photosynthesis. 
    • The cell wall of brown algae has an inner cellulose layer and outer gelatinous coat which is composed mainly of algin, it is used as an emulsifying agent and a stabilizer. 
  • Question 8
    1 / -0
    Zygote does not undergo immediate reduction division in?
  • Question 9
    1 / -0
    Which is amphibious?
    Solution
    Polygonum is an amphibious plant that grows both on land and underwater. Depending on their growth environments, they develop morphologically different types of leaves.
    So, option C is the correct option.
  • Question 10
    1 / -0
    Sanjeevani booti, brought about by Lord Hanuman to cure Laxman, is obtained by 
    Solution
    Laminaria is brown algae which belong to class Phaeophyceae. It has been used for heartburn, indigestion to induce labour and delivery or surgical procedures. Antocems is hornwort, Adiantum a maidenhair tree is also known as walking fern while SeiagInella bryopteris is the source of Ayurvedic medicine sanjeevni booti. 
    Hence correct answer is option A.                            
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