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Diversity in Living Organisms Test - 44

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Diversity in Living Organisms Test - 44
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  • Question 1
    1 / -0
    Which of the following is developed in aves?
    Solution
    A) Birds have only one aortic arch.
    B) Birds have right aorta.
    C) Mammals have left aorta.
    D) Birds only one aorta that is right aorta.
    So the correct answer is 'Right aorta'.
  • Question 2
    1 / -0
    The avian/reptilian eyes are peculiar because of the presence of
    Solution
    A) Pecten is a comb-like structure of blood vessels present in the choroid of the eyes of reptiles and birds which nourishes the retina and gives the eye a peculiar appearance.
    B) The number of cones in reptilian and avian eyes are similar to mammalian eyes.
    C) Reptiles have a slitted pupil that helps in night vision. Birds have large pupils to allow more light through and can sense more colours than human do, along with colours from the ultraviolet spectrum.
    D) Birds and reptiles have sensitive retinas, but this does not alter the appearance of their eyes.
    So the correct answer is 'Pecten'.
  • Question 3
    1 / -0
    The power of young birds to return to the original grounds of parents is
    Solution
    A) Birds remember parental care, but they do not have sufficient intelligence to locate theitr parents.
    B) Birds return to the original grounds of parents due to instinct.
    C) Young birds return to the original nesting grounds of parents due to their instincts.
    D) Young birds are not yet intuitive. They rely only on instincts.
    So the correct answer is 'Instinct only'.
  • Question 4
    1 / -0
    Voice box of birds is
    Solution
    A) Larynx is the voice box of mammals.
    B) Syrinx is the voice box of birds.
    C) Pharynx is the membrane-lined cavity behind the nose and mouth that connects them to the oesophagus.
    D) Synapse is the junction between two nerve cells.
    So the correct answer is 'Syrinx'.
  • Question 5
    1 / -0
    In birds, crop is used for
    Solution
    A) The food moves from the crop to the proventriculus, the first part of the stomach, where it is acted upon by gastric acid, mucus, and other digestive juices. The second part of the stomach, the gizzard, grinds the food into smaller pieces. Once the food is sufficiently broken down, it moves into the small intestine, where the liver and pancreas help with absorbing nutrients. 
    B) The gizzard is a modified stomach used to crush and grind food. Some birds also swallow small stones to aid in grinding of food.
    C) The crop of birds is used to store food temporarily and soften it partially before it proceeds down into the proventriculus.
    D) The crop is used to store food temporarily and soften it.
    So the correct answer is 'Storing and softening food'.
  • Question 6
    1 / -0
    In birds, crop is
    Solution
    A)The crop is a muscular pouch near the throat which is essentially an enlarged part of the esophagus. It is used to temporarily store food.
    B) The gizzard is the hind part of the stomach modified for grinding food.
    C) The crop is a modified esophagus.
    D) The rectum of birds is fused with their genital openings to form a cloaca.
    So the correct answer is 'Modified esophagus'.
  • Question 7
    1 / -0
    Avian pelvic girdle is
    Solution
    A) Birds have narrow and elongated pelvises.
    B) Birds have an elongated pelvis to aid in egg laying and flight.
    C) The hips consist of the pelvis, which includes three major bones: the ilium, ischium, and pubis. These are fused into one to allow birds to lay eggs. Birds have a greatly elongated pelvis, similar to some reptiles.
    D) The pelvis is almost parallel to the ground.
    So the correct answer is 'Elongated'.
  • Question 8
    1 / -0
    Wish bone is a bone found in birds
    Solution
    A) The pelvic girdle in birds is elongated and lighter to aid in flight.
    B) The keel is a boat shaped extension of the sternum.
    C) Wish bone in birds is formed due to the fusion of the two clavicles to strengthen the thoracic skeleton to withstand flight.
    D) Wishbone is formed by the fusion of two clavicles.
    So the correct answer is 'Product of fused clavicles'.
  • Question 9
    1 / -0
    A wingless bird is
    Solution
    The common ostrich or simply ostrich, species of large flightless bird native to Africa is a wingless bird. Unlike most birds, their flat breast bone lacks the keel that anchors the strong pectoral muscles required for flight. Their puny wings can't possibly lift their heavy bodies above the ground.
    So, the correct answer is 'Ostrich'.
  • Question 10
    1 / -0
    Flightless bird Rhea is found in
    Solution
    A) Rhea is not found in Australia.
    B) Rhea is a large, flightless bird native to South America and is found only there. 
    C) Rhea is not found in North America. It is found in South America.
    D) Rhea is not found in Africa.
    So the correct answer is 'South America'.
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