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Diversity in Living Organisms Test - 56

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Diversity in Living Organisms Test - 56
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  • Question 1
    1 / -0
    Function of amnion in birds is
    Solution
    Usually, the embryo of birds and reptiles has an extraembryonic membrane that develops within an egg inside the shell. It basically protects the embryo in a sack filled with amniotic fluid.
    So, the correct answer is 'Protection'.
  • Question 2
    1 / -0
    In which group, the animals have hollow bones:
    Solution
    Birds have hollow bones. These bones make birds light-weighted which works in their favour while flying. 
    So, the correct answer is option B.
  • Question 3
    1 / -0
    Which is a flightless bird?
    Solution
    After ostrich, emu happens to be the second largest bird in the world at a height of about 6.2 ft. It is a native of Australia and is a flightless bird. They are around 2 m long and can travel long distances at a pace of around 50kmph. They normally feed on a variety of plants and insects. Mating season is from May to June and females fight amongst themselves for a mate. 
    So, the correct answer is 'Emu'.
  • Question 4
    1 / -0
    Feathers present over nestlings are
    Solution
    • A nestling is a young bird that has not yet learned to fly and has not left the nest.
    • The Down of birds is a layer of fine feathers found under the tougher exterior feathers. 
    • Very young birds(nestlings) are clad only in down they do not have tough external feathers. Down is a fine thermal insulator and padding, used in goods such as jackets, bedding (duvets), pillows and sleeping bags.
    • Hence Feathers present over nestlings are Down.
    • So, the correct answer is 'Down'.
  • Question 5
    1 / -0
    Largest bird is
    Solution
    The ostrich is a flightless bird belonging to the family Struthionidae of class Aves. The common ostrich is the largest living bird on the Earth. They are natives of Africa and also found to the north and south of the equatorial forest zone.
    So, the correct answer is 'Ostrich'.
  • Question 6
    1 / -0
    Birds are able to recognise their home through 
    Solution
    Birds often find their way back home all by themselves. Most often this is attributed to their sense of the magnetic field of the Earth. Works by various scientists suggest that this is possible because of the use of quantum mechanics by birds. The light striking the retina of a bird’s eye is assumed to be the stimulant for chemical reactions that are responsible for the use of the magnetic field of Earth by birds to recognize their home.
  • Question 7
    1 / -0
    Which of the following is not a bird?
    Solution
    Out of the given options, Himalayan quail, albatross and magpie are three different birds. Bufo, however, is not  a bird, but an amphibian. It is a toad belonging to the family Bufonidae.
    So, the correct answer is option C- 'Bufo'. 
  • Question 8
    1 / -0
    Which one is not a flightless bird?
    Solution
    Out of the options given, Struthio, Emu, and Cassowary are all flightless birds. On the other hand, Psittacula, or the Afro-Asian ring-necked parakeet are birds found across Asia and some species are even found in Africa. They mostly have a green plumage and the adults might even have coloured heads. They also have a stout bill and a long bill. They can fly across long distances are hence, not flightless birds.
    So, the correct answer is option C.
  • Question 9
    1 / -0
    The only true skin gland of the birds is:
    Solution
    Birds have dry skin and have very few glands. The preen gland, present below the bird’s tail, is the only true gland that it has that secretes oil to keep the bird’s feathers in a good condition.
    So, the correct answer is 'Uropygial gland.
  • Question 10
    1 / -0
    Diameter of Ostrich egg is
    Solution
    The diameter of Struthio (common ostrich) egg is 7m. It is the largest laid egg.
    So, the correct answer is '7cm'.
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