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Plant Kingdom Test - 30

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Plant Kingdom Test - 30
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Marchantia is bryophyte because it lacks_______________.
    Solution
    • Bryophytes are small, non-vascular plants, such as Mosses, Liverworts, and Hornworts. 
    • They have an independent gametophyte phase in their life cycle, but the sporophytic phase depends on gametophyte for water and nutrient.
    • The male reproductive structure is the antheridium while the female reproductive structure is the archegonium responsible for producing male and female gamete, respectively.
    • Lack of vascular tissue and independent sporophyte are the characteristics features of division Bryophyta.
    • Marchantia is an example of a Bryophyte. 

    Hence, the correct option is D.
  • Question 2
    1 / -0
    Which pigment is found in phaeophyceae?
    Solution
    Phaeophyceae (brown algae) is a large group of mostly marine algae. Brown algae belongs to a very large group Heterokontophyta, a eukaryotic group of organism distinguished most prominently by having chloroplast. Most of the brown algae contain the pigment fucoxanthin which is responsible for the distinctive greenish brown color that gives them their name. 
    Members of group possess a characteristic color that ranges from olive green to various shades of brown, depending upon the proportion of brown pigment fucoxanthin  to green pigment (chlorophyll a and chlorophyll c).
    Therefore, the correct answer is option A.
  • Question 3
    1 / -0
    Acetabularia, a largest unicellular plant, belongs to
    Solution
    Acetabularia acetabulum is a unicellular eukaroyote, which is green in colour. It is a photosynthetic green algae containing chloroplast. It is a single celled organism, but gigantic in size, complex in form, making it an excellent model organism for studying cell biology. It belongs to the Chlorophyta.
    Thus, the correct answer is option A.
  • Question 4
    1 / -0
    Phycobilins are the pigments of
    Solution
    Phycobilins are the pigments which are characteristic of red or blue algae. The phycobilins are of two types called as phycoerythrin and phycocyanin. Phycoerythrin is the red pigment found in Rhodophyta and the phycocyanin is the blue pigment found in the Cyanophyta. These are water-soluble pigments found in the stroma of the chloroplast. 
    Thus, the correct answer is option D. 
  • Question 5
    1 / -0
    Food reserve in Rhodophyta is
    Solution
    Red algae (Rhodophyta) are one of the oldest groups of eukaryotic algae. They are mostly marine, multicellular algae including notable seaweeds.
    Red algae forms a distinct group characterized by these attributes:
    Eukaryotic cells without flagella, centrioles, using floridean polysaccharides as food reserve, phycobiliprotein as a accessory pigments (giving red color), with chloroplast lacking external endoplasmic reticulum and containing unstacked thylakoids.
    Red algae (Rhodophyta) used as edible algae is a good source of energy, vitamins and proteins. It is estimated that one molecule of floridean is assembled from 15 glucose unit a good source of energy.
    Other options: 
    Option B: Mannitol is a reserve food material of brown algae
    Option C: Leucosin is a carbohydrate occurring in the form of whitish lumps as a food reserve in many yellow green algae (Chrysophyceae).
    Therefore, the correct answer is option A.
  • Question 6
    1 / -0
    Deepest algae in sea are
    Solution
    Red algae have red pigment phycoerythrin which carries out photosynthesis using only short wavelength light found in greater depth.
    Sunlight is broken into its component colour as it penetrates into ocean, longer wavelengths are weak hence, cannot penetrate deep in sea while shorter wavelength do.
    Other options: 
    Option B: Brown algae are mostly marine, including seaweeds. Sargassum has a unique habitat of tropical seashores. Many brown algae grow along rock seashores.
    Option C: Green algae are common in areas where light is abundant such as shallow water and tide pools.
    Option D: Golden algae (Chrysophyceae) are present in both fresh and marine water. 
    Thus, the correct answer is option A.
  • Question 7
    1 / -0
    Which of the following is a form class of red algae?
    Solution
    Kingdom Algae is classified in three major group.
    1. Green Algae or Chlorophyceae (e.g., Volvox, Chlorella, Chara)
    2. Brown Algae or Phaeophyceae (e.g., Fucus)
    3. Red Algae or Rhodophyceae (e.g., Polysiphonia)
    Therefore, the correct answer is option C.
  • Question 8
    1 / -0
    A plant that has well differentiated body, special tissues for transport of water and other substances, but does not have seed or fruits is a
    Solution
    Bryophytes lack true roots, stem or leaves. Angiosperms are flowering plants having roots, stem, leaves, flowers, fruits, seed, well developed vascular system. Gymnosperms are a group of plants in which seeds are not covered, i.e., are naked. Pteridophytes are the group of plants that have a well-differentiated body, special vascular tissues (xylem and phloem) but do not have seed or fruits. They have spores. 
    So, the correct answer is 'Pteridophyte'
  • Question 9
    1 / -0
    Experiments demonstrating the importance of the nucleus in controlling the growth of the cell was performed in 
    Solution
    Nucleus is a double membrane covered protoplasmic body that contains hereditary information. With the help of grafting experiments on Acetabularia, Hammerling (1953) proved that nucleus is a store-house of hereditary information and hence, controls growth because growth depends on proteins synthesized and protein synthesis depends on the hereditary information.
  • Question 10
    1 / -0
    Photosynthetic pigments common to all algae
    Solution
    Chlorophyll a acts as a reaction center and carotene shows a wide range of light absorption for photosynthesis.
    In all algae, chlorophyll a acts as a reaction center which absorbs light energy and converts it into chemical energy which makes photosynthesis possible. Carotene and chlorophyll a molecules are water insoluble and remains attach to the cell. Carotene absorbs light energy and transfer it to chlorophyll a as they cannot directly transfer it to photosynthetic pathway.
    Carotene are orange yellow red color pigments which shows a wide range of light absorption in photosynthesis.
    Other options: 
     Chlorophyll b occurs only in green algae and plants.
     Xanthophyll occurs only in Phaeophyta (brown algae) and Chlorophyta (green algae). 
    Therefore, the correct answer is option C.
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