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Plant Kingdom Test - 43

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Plant Kingdom Test - 43
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  • Question 1
    1 / -0
    The plants having vascular tissue but lacking seeds are placed under
    Solution
    Pteridophyta is a developed plant which can survive on land as they have well developed vascular tissues. However they reproduce through spores and do not have seeds. 
    So, the correct answer is option C.
  • Question 2
    1 / -0
    Botanical name of peat moss is
    Solution
    The botanical name of the peat moss is Sphagnum. The partially decomposed remains of formerly living Sphagnum moss from bogs are known as peat moss. It increases the water holding capacity of soil and enrich the soil with the nutrients. It increases the capillary forces and cation exchange capacity.
    So, the correct answer is option A.
  • Question 3
    1 / -0
    Agar-Agar is obtained form 
    Solution
    Agar -Agar is mainly used to solidify the media. It is obtained from algae. It is a polysaccharide agarose. It is mainly obtained by boiling the suspension of algae. It forms the supporting structure in the cell walls of certain species of algae. It is a linear polymer, made up of repeating units of agarobiose, a disaccharide made up of D-galactose and 3,6-anhydro-L-galactopyranose. It is obtained by Gigartina, Gelidium, Graciilaria.
    So, the correct answer is option D.
  • Question 4
    1 / -0
    Shell fish taken from water during a red tide would be
    Solution
    Neurotoxic shellfish poisoning (NSP) is caused by the consumption of molluscan shellfish contaminated with brevetoxins primarily produced by the dinoflagellate. 
    So, the correct answer is 'Poisoned with neurotoxin'
  • Question 5
    1 / -0
    Identify the alga known for a biological activity called bioluminescenence.
    Solution
    Noctiluca also was known as sea sparkle is a bioluminescent alga which grows so abundantly that water sparkles blue light at night which helps in keeping away predators also. 
    Thus, the correct answer is option B.
  • Question 6
    1 / -0
    Algae are autotrophic. Which of the following statement can be related to autotrophs?
    Solution

    • Algae are autotrophic means they prepare their own food. 
    • To be more specific, they are photoautotrophic i.e they use light energy to prepare their own food. 
    • Although some algae are heterotrophs, majority of them are capable of making their own food by themselves.
    • The correct answer is A.

  • Question 7
    1 / -0
    Branch dealing with study of algae is
    Solution
    • Phycology is the scientific study of algae. It is also called algology. It is a branch of life science and often is regarded as a sub-discipline of botany.
    Algae are important as primary producers in aquatic ecosystems. Hence, the branch dealing with the study of algae is phycology.
    • So, the correct answer is 'phycology'.
  • Question 8
    1 / -0
    Red tide is mostly caused by
    Solution

    • Gymnodinium breve (later named as Karenia brevis) is a unicellular photosynthetic dinoflagellate mostly found in marine waters. 
    • It is responsible for causing red tides when they are multiplied to higher than normal concentration. 
    • Noctiluca results in green tides. Symbiodinium is related to coral reefs. Nematodinium is light sensitive.
    • The correct answer is B. 

  • Question 9
    1 / -0
    In isogamous species, the gametes of Chlamydomonas undergo temporary clustering before they depart in pairs. The phenomenon is called
    Solution
    • Clumping is a behavior in an organism, usually sessile, in which individuals of a particular species group close to one another for beneficial purposes.
    • Clumping can be caused by the abiotic environment surrounding an organism. Hence, In isogamous species, the gametes of Chlamydomonas undergo temporary clustering before they depart in pairs. The phenomenon is called Clumping.
    • So, the correct answer is "Clumping'.
  • Question 10
    1 / -0
    Thin-walled resting spored produced by Chlamydomonas in dry conditions of environment are
    Solution
    • Aplanospores are nonmotile asexual spores found in certain algae and fungi. They are formed from a part of a protoplast of a vegetative cell.
    •  Aplanospores consists of a cell wall, which is different from the original parental cell wall, allowing the survival of the organism in harsh conditions. Hence, the Thin-walled resting spored produced by Chlamydomonas in dry conditions of the environment is Aplanospores.
    • So, the correct answer is "Aplanospores'.
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