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Plant Kingdom Test - 50

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Plant Kingdom Test - 50
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  • Question 1
    1 / -0
    Algae are included in
    Solution
    Thallophytes are a polyphyletic group of non-mobile organisms that are grouped together on the basis of similarity of characteristics, but do not share a common ancestor. They were formerly categorized as a sub-kingdom of kingdom Plantae. These include lichens, algae, fungus, bacteria and slime moulds and bryophytes. 
  • Question 2
    1 / -0
    Fucoxanthin occurs in
    Solution
    Phaeophyceae members are brown algae as yellowish brown pigments called xanthophylls is predominant. They are usually marine,multicellular and macroscopic in size. They have motile reproductive cells which are pyriform and have two laterally inserted flagella, one of which is of tinsel type. The reserve food material is laminarin and mannitol.
    So, the correct answer is 'Phaeophyceae'
  • Question 3
    1 / -0
    Moss plants develop from
    Solution
    • The protonema is an elongated and thread-like structure. This structure develops from the germinated spore of mosses and some liverworts. 
    • This structure forms the earliest stage in the life cycle of the bryophytes. 
    • The protonema then grows and develops to form the leafy gametophytic structure.
    • Green leafy gametophytic plant is the dominant phase of life cycle of mosses.

    Thus, the correct answer is option B.
  • Question 4
    1 / -0
    An alga which can be possibly used in space flight (Space Alga) is
    Solution
    Chlorella is a green algae. It is a rich source of proteins and contains high levels of iron, vitamins and amino acids. Being an alga it provides oxygen and consumes the carbon dioxide exhaled by humans. This reduces the requirement of carrying heavy oxygen tanks in space flights. Thus the correct answer is option B.
  • Question 5
    1 / -0
    Chloroplast of Chlamydomonas is
    Solution
    A single cup-shaped chloroplast is characteristic of Chlamydomonas. It occupies the major portion of cell and is thick at the base while its sides are relatively thin and projected upward.
    Hence the correct answer is B. 
  • Question 6
    1 / -0
    Meiosis occurs in the zygote of
    Solution
    Chlamydomonas is an example of algae with the haplontic life cycle. The haplontic life forms produce the gametes through mitosis. After fertilization, a zygote is formed. In the case of Chlamydomonas,  zygospore represents diploid zygote. This zygospore is the only diploid cell in the entire lifecycle. It is thus that same zygospore that later undergoes meiosis to form haploid offspring.
  • Question 7
    1 / -0
    Moss plant is a
    Solution
    • In mosses, the dominant stage is the haploid generation (the gametophyte).
    • This means that the green, leafy gametophytic tissue we see in mosses is actually a gametophyte.
    • Mature sporophytes remain attached to the gametophyte. They consist of a stalk called a seta and a single sporangium or capsule.

    So, the correct answer is option A.

  • Question 8
    1 / -0
    Nutrient medium is made semisolid by adding
  • Question 9
    1 / -0
    Floridean starch occurs in
    Solution
    • Floridian starch is the characteristic photosynthetic reserve substance of red algae, occurring abundantly in certain basin-shaped grain cells. 
    • Most Rhodophyceae store starch outside the chloroplast, often as a cap over a bulging pyrenoid. 
    • The major carbohydrate storage product of red algae is a type of starch molecule (Floridean starch), that is more highly branched than amylopectin. Floridian starch is stored as grains outside the chloroplast. 
    Thus, the correct answer is option C.
  • Question 10
    1 / -0
    Pyrenoid consists of
    Solution
    Pyrenoids are sub-cellular micro-compartments found in chloroplasts of many algae and in a single group of land plants, the hornworts. A pyrenoid consists of a central protein body surrounded by a starch envelope. The central mass of protein is called pyreno-crystal.
    Correct answer is option A.
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