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Diversity in Living Organisms Test - 15

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Diversity in Living Organisms Test - 15
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  • Question 1
    1 / -0
    Which of the following is a/are characteristic/s of a fish?
    Solution
    A. Dermal scales are the projections from the dermis of an animal.
    B. Epidermal scales are the extension of epidermal layer into projections.
    C. Lateral line organs is a system of sense organs (for the perception of vibration, movement or pressure in the surrounding water) present in aquatic vertebrates such as fishes.
    Fishes have dermal scales such as placoid scales and have lateral line sense organs. 
    Hence, both options A and C are correct. So, the correct answer is 'Both A and C'.
  • Question 2
    1 / -0
    Cartilaginous fishes do not contain:
    Solution
    Cartilaginous fishes have a cartilaginous exoskeleton and belong to class Chondrichthyes. Example: Sharks. 
    Their characteristics are:
    • Broad paired fins and caudal fin.
    • Gills are not covered by an operculum (gill cover).
    • Exoskeleton contains placoid scales which are dermal in origin.
    • Mouth is ventral.
    Cartilaginous fishes do not contain gill cover/operculum. So, the correct answer is 'Gill cover/operculum'.
  • Question 3
    1 / -0
    The vertebrate animal which is not egg laying is
    Solution
    Mammals do not lay eggs but reproduce and develop the embryo within their body before giving birth. They are known as viviparous.
    So, the correct answer is 'Mammals'.
  • Question 4
    1 / -0
    Whales live in water. They belong to the group of vertebrates called
    Solution
    • Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. Whales are creatures of the open ocean; they feed, mate, give birth, suckle and raise their young at sea. So extreme is their adaptation to life underwater that they are unable to survive on land.
    • Whales are warm-blooded animals, they breathe air, have hair, and females feed their babies with milk from mammary glands. Hence they belong to the group of vertebrates called mammals.
    • So, the correct answer is 'Mammals'.
  • Question 5
    1 / -0
    Pelvic fins of bony fishes are
    Solution
    Pelvic fins are also called ventral fins and are paired. These are generally located behind the pectoral fins at the anterior end. Pectoral fins are called fish's arm and are located on each side of the body of fish.
    So, the correct answer is 'Anterior below pectoral fins'.
  • Question 6
    1 / -0
    The heart of fish is:
    Solution
    The heart of fish has two chambers only. The heart has one atrium and one ventricle. Fish is a simple organism and therefore, does not require complex circulatory systems comprising a complex heart.
    So, the correct answer is option B.
  • Question 7
    1 / -0
    A herbivorous fish is
    Solution
    A. Labeo (the carp) is found in clear and sluggish streams and rivers. It is a herbivorous fish and mainly feeds on phytoplankton and underwater vegetation.
    B. Rita fish is a species of catfish. It is a carnivorous fish that feeds on small insects, crustaceans and even dead organic matter.
    C. Anabas, known as climbing perch, is a common freshwater fish. It is a carnivorous fish and is fond of eating earthworms.
    So, the correct answer is 'Labeo'.
  • Question 8
    1 / -0
    The animals that give birth to young ones are _________.
    Solution
    • Mammals are the warm-blooded vertebrate animal that is distinguished by the possession of hair or fur, females that secrete milk for the nourishment of the young. They give birth to young ones so they are known as viviparous.
    • Reptiles and birds lay eggs, i.e., oviparous animals.
    So, the correct answer is 'Mammals'.
  • Question 9
    1 / -0
    Heart is two chambered in:
    Solution
    A. Fishes have a two-chambered heart (one auricle and one ventricle).
    B. Amphibians have a three-chambered heart (two auricles and one ventricle).
    C. Reptiles have incompletely four-chambered heart (two auricles and partly divided ventricles).
    D. Birds have a four-chambered heart (two auricles and two ventricles).
    E. Mammals have a four-chambered heart (two auricles and two ventricles).
    So, the correct answer is option A-'Fishes'.
  • Question 10
    1 / -0
    A marine mammal of carnivora is
    Solution
    (A)Otter is a terrestrial carnivore.
    (B)Walrus is a marine carnivore.
    (C)Porpoise is considered as a marine carnivore.
    So, the answer is 'Both B and C'. 
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