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Diversity in Living Organisms Test - 30

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Diversity in Living Organisms Test - 30
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  • Question 1
    1 / -0
    Bombay Duck is a:
    Solution
    Bombay duck is the common name of Harpadon nehereus, which is a fish. It belongs to the class Pisces.
    So, the correct answer is option B.
  • Question 2
    1 / -0
    Amongst animals, asymmetry occurs in _____________.
    Solution
    Answer is option B i.e. "Porifera"
    Symmetry refers to the body plan. Porifera are most commonly asymmetrical.
    While, Coelenterates body-form is radially symmetrical. Molluscs are bilaterally symmetrical and Scorpions have bilateral symmetry.
  • Question 3
    1 / -0
    Which one is not characteristic feature of subphylum vertebrata?
    Solution
    Vertebrates are also known as euchordates. They are advanced chordates. Characteristics of phylum Vertebrata are:
    • The notochord is present only in embryonic stages and in adults, it is replaced by vertebral column or backbone.
    • The heart is centrally placed and is usually with a hepatic portal system.
    • The excretory organs are paired kidneys.
    • Skin is covered by a protective skeleton which consists of lateral appendages, hair, feathers, etc.
    Hence, notochord in an adult is not a characteristic feature of subphylum Vertebrata. 
    • So, the correct answer is 'Notochord in adult'.
  • Question 4
    1 / -0
    Illicium is modified
    Solution
    A. Dorsal fin is located at the back of the fish and helps the fish to take sudden turns.
    B. Dorsal spine is a portion of vertebral column in vertebrates.
    C. Scales are the dermal appendages present on the surface of the skin of fishes.
    D. Caudal fin is also known as the tail fin and present at the end of the body of fishes.
    In fishes such as Angler fish, Illicium is modified in the first dorsal spine which is one of the three distinct portions on the vertebral column.
    So, the correct answer is 'First dorsal spine'.
  • Question 5
    1 / -0
    Pectoral fins are enlarged in
    Solution
    A. Hippocampus, commonly known as sea horse, is a small marine fish.
    B. Exocoetus is known as flying fish. It has a powerful tail by which it is able to make large jumps over the surface of water. It has enlarged pectoral fins.
    C. Coccosteus is a genus of extinct placoderm fishes.
    D. Scoliodon is known as Dog fish. It has powerful sense of smell like that of a dog.
    So, the correct answer is 'Exocoetus'.
  • Question 6
    1 / -0
    Glomerular kidney occurs in fish
    Solution
    A. Tilapia is a freshwater cichlid fish. It is an edible fish and used as a source of food.
    B. Cirrhinus is a genus of ray-finned fishes in the Carp family.
    C. Sphyrna is a hammerhead shark. Its head is flattened and laterally enlarged into a hammer.
    D. Exocoetus is known as flying fish. It has a powerful tail which helps it to take large jumps over the surface of the water. 
    A glomerular kidney is present in Exocoetus. So, the correct answer is 'Exocoetus'.
  • Question 7
    1 / -0
    Ampullae of Lorenzini occur in
    Solution
    Ampullae of Lorenzini are a kind of special sensory organs which are called electroreceptors. These are generally found in cartilaginous fishes (rays, sharks and Chimaera).
    So, the correct answer is 'Fish'.

  • Question 8
    1 / -0
    Nauplius larva occurs in __________.
    Solution
    C. Crustacea
    Reason: Nauplius larva is the first free-swimming, planktonic larvae of most marine and some freshwater crustaceans. Crustaceans belong to the phylum Arthropoda. It has no evident segmentation. There is a single median, Naupliar eye at the front of the head. There are only three pairs of appendages, the first and second antennae and the mandibles. So the correct option is C.
  • Question 9
    1 / -0
    Which one is flying fish?
    Solution
    B. Exocoetus
    Reason: Exocoetus is a marine aquatic fish which develops enlarged pectoral fins. This pectoral fins are large to produce a wing like structures which helps the fishes in gliding and floating in air. That is why those are known as "flying fish". 
    So the correct option is to B.
  • Question 10
    1 / -0
    Parents of ammocoete larva show _______________.
    Solution
    D. Anadromous migration
    Reason: Petromyzon or sea lampreys are the organisms which belong to the class cyclostomata under the superclass Agnatha. Those are the most primitive vertebrates alive in this world. They are anadromous in nature which means that they travel to fresh water for laying their eggs. After metamorphism, ammocoete larvae are observed which resembles the structure of hemichordate Amphioxus. So the correct option is D.
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