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Plant Kingdom Test - 76

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Plant Kingdom Test - 76
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following statements is true about alternation of generation in pteridophytes?
    Solution
    The life cycle of pteridophytes involves alternation of generations. This means that a diploid generation (the sporophyte, which produces spores) is followed by a haploid generation (the gametophyte or prothallus, which produces gametes).
    So, the correct answer is 'Diploid generation is followed by haploid generation'.

  • Question 2
    1 / -0
    How do gymnosperms and angiosperms differ from each other?
    Solution

    • The key difference between angiosperms and gymnosperms is how their seeds are developed.
    • The seeds of angiosperms develop in the ovaries of flowers and are surrounded by a protective fruit.
    • Gymnosperm seeds are usually formed in unisexual cones and the plants lack fruits and flowers.

    So, the correct answer is option A.

  • Question 3
    1 / -0
    Most advanced group of algae is
    Solution
    Chlorophyta, also known as green algae are called as the most advanced algae because of the following reasons:
    Chlorophyta have chlorophyll a and b and store starch as a reserve food material inside their plastids.
    It is also a diverse group of algae with most of them being fresh water forms.
    So, the correct option is B 'Chlorophyta'.

  • Question 4
    1 / -0
    Frustule is refered to as 
    Solution
    Frustule is the term used to refer to the cell wall of the diatoms. This cell wall is rich in silica and is porous. 
    A. Silicated cell wall of diatoms is called frustule.
    B. Cellulosic cell wall is the primary cell wall of plant cells.
    C. Stony cell wall in not found in bacteria, protista, fungi and plants.
    D. Lignified cell wall is the secondary cell wall in plant cells.
    Hence, the correct answer is 'Silicated cell wall'.
  • Question 5
    1 / -0
    Why bryophytes are called amphibians of the plant kingdom?

  • Question 6
    1 / -0
    Xanthophyceae is a
    Solution
    Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in freshwater, but some are found in marine and soil habitats. They may be single-celled flagellates or simple colonial or filamentous forms. Xanthophyte chloroplast contains the photosynthetic pigments chlorophyll a, chlorophyll c, β-carotene. 
    So, the correct answer is ' Yellow-green algae'.
  • Question 7
    1 / -0
    Red algae belongs to class
    Solution
    Red algae are the members of Rhodophyceae. The red colouring is because of the predominance of the red pigment, 'r-phycoerythrin' in their body. 
    So, the correct option is 'Rhodophyta'.
  • Question 8
    1 / -0
    Which of the following is likely to be found in the deepest waters?
    Solution

    • For sustaining life in the deepest waters, energy is necessary. Algae synthesize their food by using solar energy. At the bottom of deep water bodies, only high energy components of the solar spectrum are able to reach. 
    • The blue and green light components have short wavelengths and hence high energy. So, blue-green light reaches the bottom. This blue-green light is absorbed by the pigment phycoerythrin which is present in red algae. Hence, red algae is likely to be found in the deepest waters.

    So, the correct answer is 'Red algae'.
  • Question 9
    1 / -0
    Name the pigment which imparts red colour to red algae.
    Solution
    The pigments which impart the red color to red algae are phycoerythrin and phycocyanin. The algae appear red in color because these pigments reflect red light.
    So, the correct answer is 'Both A and B'.
  • Question 10
    1 / -0
    Pteridophyta falls under which category?
    Solution
    • A cryptogam is a plant or a plant-like organism that reproduces by spores, without flowers or seeds. "Cryptogamae" means "hidden reproduction", referring to the fact that no seed is produced, thus cryptogams represent the non-seed bearing plants.
    • Pteridophytes are vascular plants that reproduce using spores. They do not produce flowers and seeds and hence, are also called cryptogams. These include ferns and horsetails. 
    So, the correct option is 'Cryptogams'.
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