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NCERT Exemplar · Class 9 Science Tissues

55 questions · 55 still being checked

Multiple Choice Questions 1–10 (part 1 of 6)

  1. Exercise 1

    Which of the following tissues has dead cells?
    (a)
    Parenchyma
    (b)
    Sclerenchyma
    (c)
    Collenchyma
    (d)
    Epithelial tissue

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    NCERT’s answer
    Cell wall present 1. Cell wall absent
    (b) Sclerenchyma — its cells die after the wall thickens with lignin, leaving no living protoplasm; parenchyma, collenchyma and epithelial tissue all stay alive.

  2. Exercise 2

    Find out incorrect sentence
    (a)
    Parenchymatous tissues have intercellular spaces
    (b)
    Collenchymatous tissues are irregularly thickened at corners
    (c)
    Apical and intercalary meristems are permanent tissues
    (d)
    Meristematic tissues, in its early stage, lack vacuoles

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    NCERT’s answer
    Plastids are present 2. Plastids are absent
    (c) — apical and intercalary meristems are meristematic tissue, not permanent tissue; they keep dividing, and it is their daughter cells that mature into permanent tissue.

  3. Exercise 3

    Girth of stem increases due to
    (a)
    apical meristem
    (b)
    lateral meristem
    (c)
    intercalary meristem
    (d)
    vertical meristem

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    NCERT’s answer
    It has a large vacuole 3. It has a small vacuole
    (b) Lateral meristem — the vascular cambium runs as a ring around the stem and divides on both faces, laying down new xylem and phloem so the stem widens.

  4. Exercise 4

    Which cell does not have perforated cell wall?
    (a)
    Tracheids
    (b)
    Companion cells
    (c)
    Sieve tubes
    (d)
    Vessels

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    NCERT’s answer
    Centriole absent 4. Centriole present 55. 56. Any electron microscopic diagram of Nucleus can be drawn. It is a membrane bound organelle. 57. The ribosomes, which are present in all active cells, are the sites of protein synthesis. Endoplasmic reticulum helps in transporting these proteins to various places. The smooth endoplasmic reticulum help in manufacture of fat and lipids which alongwith proteins help in building the cell membrane. Smooth Endoplasmic Reticulum (SER) SER has no ribosomal particles on the surface, hence look smooth SER helps in the manufacture of lipids and fat molecules Rough Endoplasmic Reticulum (RER) RER has particles of ribosome on the surface. Ribosomes are the sites of protein synthesis. 58. Hints—(a) First it swells due to endosmosis and then exosmosis occurs and it shrinks. (b) It will lose water and shrink. (c) The cell will die. (d) The cell gets killed on boiling so no plasmolysis (d) All sorts of vesicle formation stops. 59. Animal cell Plant cell 1. (b) 2. (c) 3. (b) 4. (b)
    (b) Companion cells -- their wall has no sieve plate or perforation; vessels and sieve tubes both carry true open pores, and even a tracheid's wall has thin, permeable pits.Answer: (b) Companion cells

  5. Exercise 5

    Intestine absorb the digested food materials. What type of epithelial cells
    are responsible for that?
    (a)
    Stratified squamous epithelium
    (b)
    Columnar epithelium
    (c)
    Spindle fibres
    (d)
    Cuboidal epithelium

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    NCERT’s answer
    (b)
    (b) Columnar epithelium — its tall, closely packed cells carry brush-border microvilli on the gut-facing surface, which multiply the area over which digested food is absorbed.Answer: (b) Columnar epithelium

  6. Exercise 6

    A person met with an accident in which two long bones of hand were
    dislocated. Which among the following may be the possible reason?
    (a)
    Tendon break
    (b)
    Break of skeletal muscle
    (c)
    Ligament break
    (d)
    Areolar tissue break

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    NCERT’s answer
    (c)
    (c) Ligament break — ligaments hold the two bones of a joint together, so \(\displaystyle \text{ligament torn} \Rightarrow \text{bones separate} \Rightarrow \text{dislocation}\). Tendons, skeletal muscle and areolar tissue do not join bone to bone.

  7. Exercise 7

    While doing work and running, you move your organs like hands, legs etc.
    Which among the following is correct?
    (a)
    Smooth muscles contract and pull the ligament to move the bones
    (b)
    Smooth muscles contract and pull the tendons to move the bones
    (c)
    Skeletal muscles contract and pull the ligament to move the bones
    (d)
    Skeletal muscles contract and pull the tendon to move the bones

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    NCERT’s answer
    (d)
    (d) Skeletal muscles contract and pull the tendon to move the bones — the tendon anchors skeletal muscle to bone, so \(\displaystyle \text{muscle contracts} \Rightarrow \text{tendon pulls} \Rightarrow \text{bone moves}\); ligaments only join bone to bone.Answer: (d)

  8. Exercise 8

    Which muscles act involuntarily?
    (i)
    Striated muscles
    (ii)
    Smooth muscles
    (iii)
    Cardiac muscles
    (iv)
    Skeletal muslces
    (i)
    and (ii)
    (ii)
    and (iii)
    (iii)
    and (iv)
    (i)
    and (iv)

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    NCERT’s answer
    (b)
    (b) (ii) and (iii) — smooth muscle (gut, blood vessel walls) and cardiac muscle (heart) both work without conscious control; skeletal (striated) muscle alone is voluntary.

  9. Exercise 9

    Meristematic tissues in plants are
    (a)
    localised and permanent
    (b)
    not limited to certain regions
    (c)
    localised and dividing cells
    (d)
    growing in volume

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    NCERT’s answer
    (c)
    (c) Localised and dividing cells — meristem is confined to specific growing points (tip, node, cambium) where cells actively divide to add new tissue; once formed, daughter cells mature and stop dividing.

  10. Exercise 10

    Which is not a function of epidermis?
    (a)
    Protection from adverse condition
    (b)
    Gaseous exchange
    (c)
    Conduction of water
    (d)
    Transpiration

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    NCERT’s answer
    (c)
    (c) Conduction of water — that is xylem's job; the epidermis only protects the surface, lets gases pass through its stomata, and loses water vapour by transpiration.