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Plant Kingdom Test - 45

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Plant Kingdom Test - 45
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  • Question 1
    1 / -0
    Chloroplast of Chlamydomonas is
  • Question 2
    1 / -0
    Oogamy is found in which of the following species of Chlamydomonas?
    Solution
    • Oogamy or oogamous type of sexual reproduction is that sexual reproduction in which male gametes are very small as compare to female gametes and they can be motile or non-motile. 
    • But female gametes are large as compare to male gametes and are non-motile.  Chlamydomonas coccifera is oogamous.
    • Chlamydomonas eugametos undergo isogamy.
    • Chlamydomonas monoica undergoes homothallic sexual reproduction.
    So, the correct option is 'C'.
  • Question 3
    1 / -0
    In brown algae, the motile stages have flagella inserted
  • Question 4
    1 / -0
    The cells of Spirogyra differs from that of Chlamydomonas in
    Solution
    • Chloroplasts are cup-shaped in the case of Chlamydomonas whereas Spirogyra possesses spiral chloroplasts. Hence, The cells of Spirogyra differ from that of Chlamydomonas in the form or structure of chloroplasts.
    • So, the correct answer is "Form of chloroplasts'.
  • Question 5
    1 / -0
    Which one is a kelp?
  • Question 6
    1 / -0
    In Chlamydomonas, the term hologamy is applied to a mode of sexual reproduction in which
    Solution
    • The young unicellular thalli directly behave as gametes:
    • This type of reproduction is termed as hologamy in which direction the young thallus behaves as gamete and helps in the fertilization. Hence, In Chlamydomonas, the term hologamy is applied to a mode of sexual reproduction in which The young unicellular thalli directly behave as gametes.
    • So, the correct answer is "The young unicellular thalli directly behave as gametes'.
  • Question 7
    1 / -0
    Meiosis takes place in Chlamydomonas in
    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. 
    • So,  the correct option is 'Zygospore'.
  • Question 8
    1 / -0
    Red algae are similar to blue-green algae in possession of
    Solution
    • Phycobilin occurs in 3 groups of algae :
    • Cyanobacteria, Rhodophyta, and cryptophycaece are largely responsible for their distinctive colors including blue-green, red, and yellow. Hence, Red algae are similar to blue-green algae in possession of Phycobilins.
    • So, the correct answer is "Phycobilins'.
  • Question 9
    1 / -0
    A rhodophyte found in fresh water and without red colouration is
  • Question 10
    1 / -0
    The juvenile stage of the gametophyte of moss is
    Solution
    • The predominant stage of the life cycle of a moss (Bryophyte) is the gametophyte which consists of two stages. 
    • The first stage is the protonema stage, which develops directly from a spore. It is a creeping, green, branched and frequently filamentous stage. 
    • The second stage is the leafy stage, which develops from the secondary protonema as a lateral bud. It consists of upright, slender axes bearing spirally arranged leaves attached to the soil through multicellular and branched rhizoids. This stage bears the sex organs.

    So, the correct answer is option A.
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