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Plant Kingdom Test - 89

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Plant Kingdom Test - 89
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  • Question 1
    1 / -0
    Japanese food 'kombu' is prepared from
    Solution

    Kombu, is edible kelp from the family Laminariaceae, widely eaten in East Asia. Most kombu is from the species Saccharina japonica (Laminaria japonica) extensively cultivated on ropes in the seas of Japan and Korea. Kombu is edible kelp from Laminaria. Thus, the correct answer is option B.

  • Question 2
    1 / -0
    "Golden algae" is the common name of algae belonging to
    Solution
    Chrysophytes are characterized by presence of yellow and brown carotenoids which impart them golden colour; hence the name golden algae; Option A is correct answer. Pyrrophyta is reddish brown algae which are characterized by presence of peridinin that impart red-brown color. Option B is incorrect. Euglenophyta are characterized by presence of chlorophyll a, b and carotenes; they can be red/green/colourless. Option C is incorrect. Cyanohyta is also known as blue green algae as they are the only bacteria that carry out oxygenic photophosphorylation like that of algae and green plant; hence the name blue green algae. Option D is incorrect. Thus, the correct answer is option A. 
  • Question 3
    1 / -0
    When meiosis occurs in club mosses, then
    Solution
    Lycopodium is a genus of clubmosses, also known as ground pines or creeping cedar, in the family Lycopodiaceae, a fern-allies. In sporophyte generation, spore mother cells undergo meiosis and produces haploid spores which then enters into the gametophyte generation.

  • Question 4
    1 / -0
    Movement of peristomial teeth is called
    Solution
    The hygroscopic movement performed due to imbibition of water is called as hydrochasy. E.g., movement in the peristome of moss, elators in eqisetum. 
  • Question 5
    1 / -0
    Heterotrichous habit is common among
    Solution
    Heterotrichy means plants producing two types of branches, namely prostrate branches and erect branches. Erect system of filaments in the plant body develops from prostate system of filaments. In prostrate branches, branches lies just above the ground whereas in erect branches, branches are held erect. Heterotrichous habit is most commonly seen in green algae like Fritschiella, Draparnaldia, etc.
    Thus, the correct answer is option D.
  • Question 6
    1 / -0
    Which of the following best explains the evolution of sexual reproduction?
    Solution
    Chlamydomonas is best example for the evolution of sexual reproduction as the evolution of sex in algae has not taken place in any one phylogenetic line. This has taken place along several independent lines. For example, in Volvocales, where Gonium is isogamous, Pandorina slightly anisogalnous, Eudorina and Pleodorina marked by anisogamy and Volvox oogamous. It is correlated with the evolution from isogamy to oogamy through anisogamy. Whereas on the other hand, in another genus of Volvocales, i.e., Chlamydomonas, where species within the genus show all gradations from isogamy to oogamy, e.g., Chlamydomonas snowiae is isogamous, C. braunii is anisogamous and C. coccifera is oogamous.  
    Thus, the correct answer is option A.
  • Question 7
    1 / -0
    Motile stages are not found in life cycle of
    Solution
    Blue green algae reproduce by simple division/fragmentation or nonmotile spores and do not exhibit any motile phase during the life cycle. Red algae (Rhodophyceae) are characterized by the absence of any motile phase. Brown algae (Pheophyceae) are characterized by the presence of motile reproductive phase with two lateral flagella. Green algae are characterized by unicellular flagellated cells or microscopic colonies of flagellated or non-flagellated cells and reproduce by zoospores. Thus, the correct answer is option C.
  • Question 8
    1 / -0
    Most advanced group of Algae is
    Solution
    Chlorophyceae (belongs to Chlorophyta) stands nearer the main lines of evolution towards land plants than any other algal class because of the presence of photosynthetic pigments chlorophyll a and b, starch as reserve product and cellulosic cell walls.
  • Question 9
    1 / -0
    Which of the following algae produces synzoospores?
    Solution

    Vaucheria is a yellow-green alga, in which synzoospore (also called as coenozoospor) develop. These are multiflagellate zoospore which is present especially in aquatic form. This zoospore first swims for some time, then settles down and withdraws its flagella, secrets a wall around and ultimately germinates.

    The correct answer is D. 

  • Question 10
    1 / -0
    Which of the following is not correctly matched?
    Solution
    Correct Answer: C
    Explanation for the correct answer:
    • Floridean starch is a type of storage glucan found in glaucophytes and red algae. 
    • It serves as the primary sink for fixed carbon produced by photosynthesis.

    Explanation for the incorrect answers:
    Option A: Some filamentous cyanobacteria produce specialised nitrogen-fixing cells called heterocysts when they are nitrogen-starved.
    Option B: Hormogonia are motile filaments produced by unicellular filamentous cyanobacteria during vegetative reproduction.
    Option D: Blue green algae make their food with the help of chlorophyll a and sunlight, and they store it in the form of cyanophycean starch, which is similar to glycogen.
    Hence, the incorrect statement is Floridian starch – stored food of fungi.  

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