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Diversity in Living Organisms Test - 63

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Diversity in Living Organisms Test - 63
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  • Question 1
    1 / -0
    Only left arota/systematic arch is present in
    Solution
    Left systematic arch is present only in  Mammals.
    Aves only have right systematic arch.
    Reptiles have left and right systematic arch both.
    So the correct answer is 'Mammals'. 
  • Question 2
    1 / -0
    The marsupial mammal amongst the following animals is
    Solution
    Ribbon, Kangaroo, Lemur, and Spiny Anteater are all mammals.
    But Gibbon and Lemur are placental mammals.
    Spiny Anteater is a monotreme or egg-laying mammal.
    Kangaroo is a Marsupial or pouched mammal.
    So the correct answer is 'Kangaroo'.
  • Question 3
    1 / -0
    Pouch is seen in
    Solution
    Marsupials are known as pouched mammals which give birth to poorly developed live young. Their young are carried in pouches present on the bodies of the adult females (in most cases) till they are well developed.
    $$\textit{Platypus}$$ is an egg laying mammal. Bats and $$\textit{Lemur}$$ are eutharians and give rise to well developed young.
    So, the correct answer is 'Marsupial'. 
  • Question 4
    1 / -0
    Which among the following has an opposable thumb?
    Solution
    The opposable thumb is a characteristic feature of Primates. This helps them hold objects and establish strong grips.
    Only Lemurs are Primates hence have an opposable thumb.
    Kangaroo, Mole and Platypus are not primates hence do not possess opposable thumbs.
    So the correct answer is 'Lemur'. 
  • Question 5
    1 / -0
    All mammals
    Solution

    A. Correct option- D
    B. Explanation for the correct option:

    • Almost all mammals possess seven cervical vertebrae except sloths and manatees.
    • Monotremes or egg-laying mammals like platypus and echidna are Oviparous mammals.
    • Almost all mammals are heterodonts (having 4 types of teeth - incisors, canines, premolars and molars) 
    • All mammals have mammary glands and nourish their young ones. 

  • Question 6
    1 / -0
    Vascular bundles are absent in
    Solution
    A vascular bundle is a part of the transport system in vascular plants. Pteridophyes, Gymnosperms and Angiosperms possess vascular tissue that helps in the conduction of water and food.
    Hence the correct option is D.
  • Question 7
    1 / -0
    Erythrocytes of Pheretima contain
    Solution
    Pheretima exhibits a closed type of blood vascular system, consisting of blood vessels, capillaries and heart. Blood glands are present on the 4th, 5th and 6th segments. They produce cells and haemoglobin which is dissolved in blood plasma. Blood cells are phagocytic in nature.
    So the correct answer is 'Haemoglobin'
  • Question 8
    1 / -0
    For a farmer, earthworms are ..........
    Solution
    Correct Answer: A
    Explanation:
    • Earthworms make the sand porous, by burrowing the soil(land), which helps in the respiration and the development of plant roots.
    • They are natural ploughmen of land, therefore called friends of farmers.
    • Hence, the correct answer is Useful.
  • Question 9
    1 / -0
    Number of Pheretima species found in India is
    Solution
    The genus Pheretima is represented by 13 species in India. Pheretima postuma is the common Indian earthworm. A monograph on pheretima is published by K.N Bahl.
    So, the correct answer is '13'. 
  • Question 10
    1 / -0
    Pheretima is
    Solution
    The enteronephric nephridial system in Pheretima, which discharges excretory fluid into the lumen of the intestine, is an adaptation for the conservation of water. Earthworms mostly excrete urea as the excretory products and are describes as ureotelic animals. 
    So the correct answer is 'Ureotelic'.
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