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Plant Kingdom Test - 36

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Plant Kingdom Test - 36
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  • Question 1
    1 / -0
    Meiosis occurs in Pteridophytes during _____________.
    Solution
    • The life cycle of Pteridophytes is dominated by the sporophyte (sexual) stage of the alternation of generations. 
    • Sporophyte plant produces haploid spores after meiosis that germinate to produce gametophyte plant body.
    • Gametophyte plant body is responsible for formation of male and female gametes through mitosis only.
    • These haploid gametes fuses to form diploid zygote that divides and differentiate to produce sporophyte plant body.

    So, the correct answer s option B.
  • Question 2
    1 / -0
    In Dryopteris
  • Question 3
    1 / -0
    Chl a, Chl d and phycoerythrin occur in _______________.
    Solution
    The members of Rhodophyceae are red algae because of the predominance of the red pigment r-phycoerythin in their body. Apart from this, other major pigments found in them are chlorophyll a and chlorophyll d
    So, the correct answer is 'Rhodophyceae'
  • Question 4
    1 / -0
    Pigment mainly responsible for photosynthesis in red algae is ___________.
    Solution

    The red algae (Rhodophyta) contains phycoerythrin which reflects red light and absorbs blue light, but the pigment which is mainly responsible for photosynthesis in red algae is Chlorophyll A.

    The correct Answer is B.

  • Question 5
    1 / -0
    Ancestors of land plants were ______________.
    Solution
    Research shows that the closest relatives to land plants are actually conjugating green algae such as Spirogyra. Ancestors of green plants began to colonise the land about 500 million years ago and it is generally accepted that they evolved from streptophyte algae (a group of green, fresh water algae).
    So, the correct answer is 'Green Algae'
  • Question 6
    1 / -0
    What is true about angiosperms ?
    Solution
    • The seeds of Angiosperms are covered by fruits and not naked.
    • They have well developed vascular tissue.
    • They do not fall under Cryptogams. They are Phanerogams.
    Hence the correct option is C.
  • Question 7
    1 / -0
    Lower plants having green pigments similar to those of higher plants are
    Solution

    Chlorophyceae are a type of red algae which are green in colour due to the presence of chlorophyll a, chlorophyll b and beta carotene.  Similarly higher plants also possess green colour due to the presence of chlorophyll.

    The correct answer is B.

  • Question 8
    1 / -0
    Sea weeds are a source of __________.
    Solution
    Seaweed is an very important ingredient  in cuisines all over. It's the best dietary source of iodine, which helps support thyroid gland. It also contains other vitamins and minerals, such as vitamin K, B vitamins, zinc and iron, along with antioxidants that help protect your cells from damage. 
    So, the correct answer is 'Iodine.'
  • Question 9
    1 / -0
    Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because __________________.
  • Question 10
    1 / -0
    What is incorrect for brown algae ?
    Solution

    Brown algae are also called as Phaeophyceae and are present mainly in marine habitats. They possess Chlorophyll a & c and not chlorophyll a & b. The fucoxanthin pigment present in them is responsible for its brown colour.

     

    The correct answer is C.

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