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NCERT Exemplar · Class 9 Science Diversity in Living Organisms

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Short Answer Questions 45–49 (part 6 of 7)

  1. Exercise 45

    Fill in the blanks
    (a)
    Five kingdom classification of living organisms is given by ———.
    (b)
    Basic smallest unit of classification is ———.
    (c)
    Prokaryotes are grouped in Kingdom ———.
    (d)
    Paramecium is a protista because of its ———.
    (e)
    Fungi do not contain ———.
    (f)
    A fungus ——— can be seen without microscope.
    (g)
    Common fungi used in preparing the bread is ———.
    (h)
    Algae and fungi form symbiotic association called ———.

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    NCERT’s answer
    (a)
    Robert Whittaker (b) Species (c) Monera (d) Eukaryotic unicellular organisms (e) Chlorophyll (f) Mushroom (g) Yeast (h) Lichens
    (a)
    R. H. Whittaker ($\displaystyle 1969$). (b) species. (c) Monera. (d) unicellular eukaryotic nature. (e) chlorophyll. (f) mushroom, e.g. Agaricus, visible to the naked eye. (g) yeast (Saccharomyces). (h) lichen.
    Answer: (a) Whittaker (b) species (c) Monera (d) unicellular eukaryotic nature (e) chlorophyll (f) mushroom (g) yeast (h) lichen.

  2. Exercise 46

    Give True (T) and False (F)
    (a)
    Gymnosperms differ from Angiosperms in having covered seed.
    (b)
    Non flowering plants are called Cryptogamae.
    (c)
    Bryophytes have conducting tissue.
    (d)
    Funaria is a moss.
    (e)
    Compound leaves are found in many ferns.
    (f)
    Seeds contain embryo.
    DIVERSITY IN LIVING ORGANISMS

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    NCERT’s answer
    (a)
    F (b) T (c) F (d) T (e) T (f) T
    (a)
    False — gymnosperm seeds are naked; a covered seed marks the angiosperms. (b) True. (c) False — bryophytes lack vascular (conducting) tissue. (d) True. (e) True. (f) True.
    Answer: (a) F (b) T (c) F (d) T (e) T (f) T.

  3. Exercise 47

    Give examples for the following
    (a)
    Bilateral, dorsiventral symmetry is found in———.
    (b)
    Worms causing disease elephantiasis is———.
    (c)
    Open circulatory system is found in———where coelomic cavity is filled
    with blood.
    (d)
    ———are known to have pseudocoelom.

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    NCERT’s answer
    (a)
    Liver fluke (b) Filarial worm (c) Arthropods (d) Nematodes
    (a)
    Platyhelminthes, e.g. Planaria — body flattened dorsiventrally. (b) Wuchereria, the filarial worm. (c) Arthropoda, e.g. cockroach — open circulation, the haemocoel bathed directly in blood. (d) Aschelminthes, e.g. Ascaris.
    Answer: (a) Platyhelminthes (b) Wuchereria (c) Arthropoda (d) Aschelminthes.

  4. Exercise 48

    Label a,b,c and d. given in Fig. 7.1\displaystyle 7.1 Give the function of (b) NCERT_Question_Class9_Science_Exemplar_Ch7_Q48

    Check this one against your book

    NCERT’s printed answer for this exercise does not match its own question. This working follows the question as printed.

    a – dorsal fin; b – caudal fin; c – anal fin; d – pelvic fin.Function of (b), the caudal fin: it drives the fish forward by side-to-side undulation and, acting as a rudder, lets it steer while swimming.Answer: a – dorsal fin, b – caudal fin, c – anal fin, d – pelvic fin; the caudal fin propels and steers the fish.NCERT prints: (c) Pelvic fin, (d) Pectoral fin — a misprint: the figure's own pointers put c on the anal fin and d on the pelvic fin, and no pointer marks the pectoral fin at all.

  5. Exercise 49

    Fill in the boxes given in Fig. 7.2\displaystyle 7.2 with appropriate characteristics/plant group (s) NCERT_Question_Class9_Science_Exemplar_Ch7_Q49

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    NCERT’s answer
    (a)
    Thallophyta (b) Without specialized vascular tissue (c) Pteridophyta (d) Phanerogams (e) Bear naked seeds (f) Angiosperms (g) Have seeds with two cotyledons (h) Monocots
    Answer: a – Thallophyta; b – do not have vascular tissue; c – Pteridophyta; d – Phanerogams; e – have naked seeds (not enclosed in a fruit); f – Angiosperms; g – have seeds with two cotyledons; h – Monocotyledons.