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Diversity in Living Organisms Test - 61

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Diversity in Living Organisms Test - 61
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  • Question 1
    1 / -0
    Indian Monkey is
    Solution
    Macaca or rhesus monkey is known as the Indian Monkey. They are largely found in the Indian subcontinent. 
    Ramapithecus are extinct apes.
    Simia are found in South America.
    Gorillas are found in Central West African countries.
    So the correct answer is 'Macaca'. 
  • Question 2
    1 / -0
    Which one is egg laying mammal?
    Solution
    Echidnal ornithorhynchus is an egg-laying mammal (monotremes). Macropus, Sorex and Didelphis are pouched mammals.
    So the correct answer is option C.

  • Question 3
    1 / -0
    Which of the following are the features of mammals?
    Solution
    Mammals are warm-blooded (can regulate their body temperature). They are viviparous animals (except platypus), which means they give birth to young ones directly. Mammals are characterized by the presence of mammary glands and hair.
    So, the correct answer is option D.
  • Question 4
    1 / -0
    Unique feature of mammalian body is the presence of: 
    Solution

    • The presence of a diaphragm is a peculiar feature of the mammalian group.
    • Four-chambered hearts can be found in birds too.
    • Mammals and birds are warm-blooded animals due to their ability to maintain their body temperature. 
    • Rib cages are found in a lot of animals other than mammals like birds, reptiles, etc.

    So the correct answer is 'Presence of Diaphragm'.
  • Question 5
    1 / -0
    Which one of the following is not a viviparous ?
    Solution
    Platypus is an egg-laying mammal (monotreme) and hence shows Ovipary.
    Kangaroos, shrews and moles are all pouched animals and give birth to poorly developed live young ones.
    So the correct answer is option B- 'Platypus'.
  • Question 6
    1 / -0
    Which one is correctly matched?
    Solution
    Arachnida is a class of joint-legged animals with most members having eight legs. Millipedes hence do not belong to Arachnida as they do not have joined legs.
    Silverfish is a wingless insect hence it is not a chordate and does not have pectoral or pelvic fins.
    Sea anemone being a cnidarian is a diploblastic organism lacking a mesoderm.
    Platypus is an egg-laying mammal and hence shows ovipary. 
    So the correct answer is 'Animal- Duck-billed Platypus, Characteristic- Oviparous, Taxon- Mammalia'.
  • Question 7
    1 / -0
    They give birth to young ones.
    Solution
    A. Kangaroo. Hedgehog, Dolphin, Loris
    EXPLANATION: Kangaroo, Hedgehog, Dolphin and Loris all belongs to class mammalia. They  are viviparous, means these type of animals can give birth to a living young instead of laying eggs. Dolphins give birth to a single baby. The birth can take a couple of hours. Baby hedgehogs are called hoglets and baby kangaroo is called joey. 
  • Question 8
    1 / -0
    Right systematic arch is absent in:
    Solution
    • In reptiles and amphibians both the arches are present (left and right).
    • Birds have only right arc present in their adult form.
    • Mammals have only the left arch present in their adult form.
    • The systematic arch in the adult organisms transports blood to all the body parts except the head.
    • So the correct answer is option A- 'Mammals'. 
  • Question 9
    1 / -0
    Which one has a copulatory organ?
    Solution
    A copulatory organ is a penis like structure which is used by males to copulate and stimulate male organs for reproduction.
    Snake, Toad and Parrot lack it.
    Squirrels have a pseudo-penis-like structure which is a copulatory organ and is small in size.
    So the correct answer is 'Squirrel'. 
  • Question 10
    1 / -0
    All mammals without any exception, are characterised by
    Solution
    Vivipary is shown by all mammals except monotremes (Platypus and echidna)
    All mammals do not have Biconcave RBCs, example Camel has ovaloid RBCs.
    Elephants do not have extra abdominal testes and four-chambered hearts are not exclusive to Mammals.
    Heterodont teeth and 12 cranial nerves are both not exclusive to mammals as they can be found in other animal groups too.
    Muscular diaphragm and mammary glands are the only characteristics having no exceptions and are exclusive to mammals.
    So the correct answer is 'A muscular diaphragm and milk-producing glands'.
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