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Plant Kingdom Test - 18

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Plant Kingdom Test - 18
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  • Question 1
    1 / -0
    When the spore of a fern plant falls on moist ground, it germinates to form a green filament. It soon grows into a flat, green, heart-shaped Structure, known as
    Solution
    The fully grown sporophyte, what is commonly referred to as the fern, produces genetically unique spores  in the sporangia  by meiosis. The haploid spores fall from the sporophyte and germinate by mitosis, given the right conditions, into the gametophyte stage, the prothallus. The prothallus develops independently ; it grows sex organs that produce  archaegonia and  antheridia.
    So, the correct option is D. (prothallus)

  • Question 2
    1 / -0
    Who is popularly known as the 'Father of Phycology'?
    Solution

    It was F. E. Fritsch, who proposed the classification of algae that they should not be divided into phyta, i.e., divisions but only into classes. According to him, algae were classified into following eleven classes based on structure and reproduction of the algae (on basis of pigmentation, reserve food and flagellation, thallus structure, modes of reproduction and life cycles). He is well known as the Father of Phycology. 

  • Question 3
    1 / -0
    In which of the following taxonomy, equal weightage is given to each of thousands of characters that a taxon exhibits?
    Solution
    Numerical taxonomy or phenetic, deals with the statistical analysis of all the traits of organisms and give equal weightage to all traits. It deals with the numeric algorithms rather than subjective evaluation of the traits.
    Classical taxonomy is the oldest form of taxonomy which is concerned with naming, description and classification of organisms.
    Chemotaxonomy considers chemical constituents of plants.
    Alpha taxonomy is a level of taxonomy that is concerned with naming and characterization of species.
    So, the correct answer is option C.
  • Question 4
    1 / -0
    Phenetic classification of organisms is based on
    Solution
    In biology, phenetics is an attempt to classify organisms based on overall similarity, usually by morphology or other observable traits, regardless of their phylogeny or evolutionary relation. It includes various forms of clustering and organisation. Phenetic classification of organisms is based on measurable similarities and differences rather than genetic makeup and evolutionary descent. 
    Thus, the correct answer is option C. 
  • Question 5
    1 / -0
    Motile sperms are absent in _______________.
    Solution
    Motile sperms are absent in Rhizopus. In Rhizopus, gametangial copulation takes place. The terminal part of sub aerial hyphae acts as coenogametes which fuse to form a diploid zygote and then a resting spore called as zygospore. It contains several diploid nuclei with reserve material. It undergoes meiosis to form spores which on germination give rise to new mycelium.
    Therefore, the correct answer is option A.
  • Question 6
    1 / -0
    Who is regarded as the "Father of Indian Phycology"?
    Solution
    Prof. M. O. P. Iyenger is regarded as the father of Indian Phycology, for his work on cytology, classification and taxonomy of algae.
    So, the correct answer is 'Prof. M. O. P.  Iyenger'
  • Question 7
    1 / -0
    Iodine is obtained from the members of
    Solution
    Brown algae has economic importance as a source of Iodine and Potash. Fucus and Laminaria are rich source of iodine. 25% of iodine is obtained from kelps and it also contain Br, Cu, Zn, Fe, Mn, Mo etc. Because of having iodine, the dried kelps are used to treat goiter.
  • Question 8
    1 / -0
    Select the correct combination of the statements (A-D)
    regarding the characteristics of certain organisms
    Methanogens are Archaebacteria which produce methane in marshy areas

    Nostoc is a filamentous blue-green algae which fixes atmospheric nitrogen

    Chemosynthetic autotrophic bacteria synthesize cellulose from glucose

    Mycoplasma lack a cell and can survive without
    oxygen

    The correct statements are


    Solution
    Chemosynthetic autotrophs oxidize inorganic substances to produce energy and helps cycling of minerals.
  • Question 9
    1 / -0
    Phycology is the study of
    Solution

    Algae are eukaryotic organisms that have importance in our ecosystem as primary producers. The study of algae is called as algalogy or phycology. The term phykos means algae or in general seaweed. Several prokaryotic forms of algae such as blue-green algae, cyanobacteria, microscopic algae, their evolution, taxonomy etc., are studied by phycologists.

  • Question 10
    1 / -0
    Mannitol (sugar alcohol) is the stored food in
    Solution
    Food is stored as complex carbohydrates; in the form of laminarin or mannitol in Phaeophycease (Brown algae). For example, Laminaria, Sargassum, Ectocarpus, Dictyota, Fucus.
    Stored food in Gracilaria and Porphyra is floridean starch. 
    Stored food in Chara is starch.
    Thus, the correct answer is option C.
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