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Plant Kingdom Test - 19

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Plant Kingdom Test - 19
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The development of a sporophyte without fertilization from the vegetative cells of the gametophyte is called as 
    Solution
    Apogamy is a type of reproduction occurring in some ferns, in which the sporophyte develops from the gametophyte without fusion of gametes.
  • Question 2
    1 / -0
    Which one of the following is a parasitic algae?
    Solution
    Cephaleuros is a genus of green algae. These are commonly called as red rust. These are parasitic on tropical and subtropical plants like mango, guava, tea etc. These are responsible for red-coloured spots on the leaves and other parts of these plants.
    So, the correct answer is 'Cephaleuros'
  • Question 3
    1 / -0
    Which one of the following is heterosporous?
  • Question 4
    1 / -0
    Which of the following is a flagellated algae?
    Solution
    Chlamydomonas is a microscopic, unicellular genus of green plants (algae) which live in fresh water. It consists of two filaments of cytoplasmic flagellae which project from the anterior or the apical end of the cell. The region of cytoplasm near the origin of the flagella is sensitive to light and there is a red pigment spot associated with it.  When the red pigment spot's shadow is cast on the sensitive area it is thought to cause turning movements of the Chlamydomonas which brings it into the region where the intensity of the light is most suitable for it. 
  • Question 5
    1 / -0
    Gametes formed by meiosis are called as
    Solution
    Coenogametes are gametes with the multi-nucleate condition. Mitogametes are gametes formed by mitosis. The gametes formed by meiosis are called meiogametes.
    So, option B is the correct answer.  
  • Question 6
    1 / -0
    The pigment phycoerythrin is characteristic of
    Solution
    Phycoerythrin is a major light-harvesting pigment that is found in red algae and cyanobacteria. It is used as a fluorescent probe and analytical reagent. Visually, the phycoerythrins appear red. 
  • Question 7
    1 / -0
    Both chlorophyll a and b are present in
    Solution
    The Chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology. They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b. The chloroplast may be discoid, plate-like, reticulate, cup-shaped, spiral or ribbon shaped in different species. 
    Thus, the correct answer is option C.
  • Question 8
    1 / -0
    Which of the following is the incorrect character of brown algae?
    Solution
    Brown algae belong to the class Fucophyceae, which is formerly known as Phaeophyceae. In brown algae, the photosynthetic pigments are Chlorophyll a, c and carotenoids. 
    They vary in colour from Olive green to various shades of brown depending upon the amount of xanthophyll pigment "fucoxanthin" present in them. 
    The vegetative body of brown algae such as in the order Laminariales is morphologically distinguished into holdfast, stipe and blade. The holdfast helps in the attachment of the thallus to the substratum. Chlorophyll a and b are present in green algae.
    So, the correct answer is A.
  • Question 9
    1 / -0
    Sporophytic generation is represented by zygote only in
    Solution
    Chlamydomonas belongs to the class Chlorophyceae. These are algae which do not show a fixed mode of alternation of generation. Hence the sporophytic generation itself is considered as the zygote. This zygote undergoes meiotic division resulting in the formation of haploid individuals i.e. game­tophyte. Zygotic meiosis is the characteristic feature of Chlamydomonas.
    Thus, the correct answer is option B.
  • Question 10
    1 / -0
    Which among the following do you consider as the best evidence to show that two species of algae are closely related?
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