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NCERT Exemplar · Class 9 Science Diversity in Living Organisms

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Multiple Choice Questions 11–20 (part 2 of 7)

  1. Exercise 11

    Find out the false statement
    (a)
    Aves are warm blooded, egg laying and have four chambered heart
    (b)
    Aves have feather covered body, fore limbs are modified as wing and
    breathe through lungs
    (c)
    Most of the mammals are viviparous
    (d)
    Fishes, amphibians and reptiles are oviparous
    DIVERSITY IN LIVING ORGANISMS

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    NCERT’s answer
    (d)
    (d) is false. Stated without qualification it ignores real exceptions — several sharks and many snakes are viviparous; (a), (b) and (c) hold without exception.

  2. Exercise 12

    Pteridophyta do not have
    (a)
    root
    (b)
    stem
    (c)
    flowers
    (d)
    leaves

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    (c)
    (c) Flowers. Pteridophytes have true roots, stems and leaves, but reproduce by spores and never bear flowers or seeds.

  3. Exercise 13

    Identify a member of porifera
    (a)
    Spongilla
    (b)
    Euglena
    (c)
    Penicillium
    (d)
    Hydra

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    (a)
    (a) Spongilla is a freshwater sponge, a Porifera; Euglena is Protista, Penicillium a fungus, Hydra a Cnidarian.

  4. Exercise 14

    Which is not an aquatic animal?
    (a)
    Hydra
    (b)
    Jelly fish
    (c)
    Corals
    (d)
    Filaria

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    (d)
    (d) Hydra, jellyfish and corals are aquatic Cnidarians; Filaria is an endoparasitic roundworm living in human lymph vessels, not free in water.

  5. Exercise 15

    Amphibians do not have the following
    (a)
    Three chambered heart
    (b)
    Gills or lungs
    (c)
    Scales
    (d)
    Mucus glands

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    NCERT’s answer
    (c)
    (c) Amphibians breathe by gills or lungs, have a three-chambered heart and moist, mucus-glanded skin, but no scales cover their skin.

  6. Exercise 16

    Organisms without nucleus and cell organelles belong to
    (i)
    fungi
    (ii)
    protista
    (iii)
    cyano bacteria
    (iv)
    archae bacteria
    (i)
    and (ii)
    (iii)
    and (iv)
    (i)
    and (iv)
    (ii)
    and (iii)

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    (b)
    (b) Cyanobacteria and archaebacteria are prokaryotes, lacking a nuclear membrane and membrane-bound organelles; fungi and protista are eukaryotic.

  7. Exercise 17

    Which of the following is not a criterion for classification of living organisms?
    (a)
    Body design of the organism
    (b)
    Ability to produce one’s own food
    (c)
    Membrane bound nucleus and cell organelles
    (d)
    Height of the plant

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    (d)
    (d) Body design, self-nutrition and a membrane-bound nucleus reflect evolutionary relationships; plant height is a variable, non-diagnostic trait.

  8. Exercise 18

    The feature that is not a characteristic of protochordata?
    (a)
    Presence of notochord
    (b)
    Bilateral symmetry and coelom
    (c)
    Jointed legs
    (d)
    Presence of circulatory system
    DIVERSITY IN LIVING ORGANISMS

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    (c)
    (c) Protochordates show a notochord, bilateral symmetry, a coelom and a circulatory system; jointed legs belong to arthropods, not protochordates.

  9. Exercise 19

    The locomotory organs of Echinodermata are
    (a)
    tube feet
    (b)
    muscular feet
    (c)
    jointed legs
    (d)
    parapodia

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    (a)
    (a) Echinoderms move using tube feet worked by the water vascular system; jointed legs and parapodia belong to other phyla.

  10. Exercise 20

    Corals are
    (a)
    Poriferans attached to some solid support
    (b)
    Cnidarians, that are solitary living
    (c)
    Poriferans present at the sea bed
    (d)
    Cnidarians that live in colonies

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    NCERT’s answer
    (d)
    (d) Corals are Cnidarian polyps that live attached together in colonies, secreting a calcareous skeleton that builds up into reefs.