HOTS Questions for Class 9 Science Chapter 6 Tissues

These Solutions are part of HOTS Questions for Class 9 Science. Here we have given HOTS Questions for Class 9 Science Chapter 6 Tissues

Question 1.
What will happen if

  1. Apical meristem is damaged or cut ?
  2. Cork is not formed in older stems and roots ?
  3. Cells of epithelial tissue are not compactly packed.
  4. Lymph is not returned to blood ?

Answer.

  1. Apical Meristem Removed: Growth in length will stop.
  2. Cork is Not Formed: If cork is not formed in older stems and roots, the outer tissues will rupture with the increase in girth and expose the interior to desiccation and infection.
  3. Epithelial tissue will not be effective as protective impermeable layer.
  4. Lymph is Not Returned to Blood: Blood volume will decrease while passage of materials from tissues to blood and vice versa would be dislocated.

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Question 2.

  1. Identify figures : A,B and C.
    HOTS Questions for Class 9 Science Chapter 6 Tissues image - 1
  2. Which one of them provides both mechanical strength as well as flexibility ?
  3. Which one of them is commercially exploited to obtain Hemp and Jute ?
  4. Which one of them can be modified to form air cavities in aquatic plants ?
  5. Which one of them has heavy deposition of lignin ?

Answer:

  1. A- T.S sclerenchyma fibres.
    B- T.S parenchyma cells.
    C- T. S collenchyma.
  2. Mechanical strength and flexibility: Collenchyma.
  3. Hemp and Jute: Sclerenchyma fibres.
  4. Aerenchyma: Modification of parenchyma.
  5. Deposition of Lignin: Sclerenchyma.

Question 3.

  1. Identify the figure. What is its function ?
    HOTS Questions for Class 9 Science Chapter 6 Tissues image - 2
  2. Label X, Y and Z .
  3. Which ones of them develop from the same mother cell ?
  4. X loses its nucleus in mature state. Still it remains alive. How ?

Answer:

  1. Identification: Phloem tissue.
    Function: Conduction of organic food.
  2. X – Sieve tube cell.
    Y – Sieve plate
    Z – Companion cell.
  3. From Same Mother Cell: Sieve tube cell and companion cell.
  4. Living of Sieve Tube Cells: It is controlled by nucleated companion cells with which they are connected by plasmodesmata.

Question 4.

  1. Identify figures A and B.
    HOTS Questions for Class 9 Science Chapter 6 Tissues image - 3
  2. Which is called tesselated and pavement epithelium ?
  3. Which one lines gastro-intestinal tract and epiglottis ?
  4. Which one allows diffusion of substances ?

Answer:

  1. Identification:
    A- Squamous epithelium
    B- Ciliated columnar epithelium.
  2. Pavement Epithelium: Squamous epithelium.
    Tesselated Epithelium: Squamous epithelium.
  3. Gastro-intesinal Tract: Simple columnar epithelium.
    Epiglottis: Stratified columnar epithelium.
  4. Diffusion of Substances: Simple epithelium, especially squamous one.

Question 5.

  1. Identify the figure.
    HOTS Questions for Class 9 Science Chapter 6 Tissues image - 4
  2. Label X, Y and Z.
  3. What is the chemical composition of material of the figure ?
  4. What is the function of Y

Answer:

  1. Identification: Section of bone.
  2. X- Periosteum.
    Y- Haversian canal
    Z- Canaliculus (plural canaliculi)
  3. Composition,
    1. Ossein (30-40%)
    2. Mineral matter
      (60-70%) of calcium and magnesium carbonate and phosphate.
  4. Function of Haversian Canal: To carry nutrients to the interior of the bone.

Question 6.
What will happen if

  1. Bone is dipped in HCl
  2. Bone is dried ?

Answer:

  1. Bone Dipped in HCl. Mineral matter dissolves. Only organic matter is left.
  2. Dried Bone. Organic matter destroyed. Only mineral matter is left.

Question 7.
What will happen if

  1. Ligament gets overstretched ?
  2. Heparin is absent in blood ?
  3. Striated muscles contract rapidly for longer duration ?

Answer:

  1. Oversretching of Ligament: Sprain.
  2. Absence of Heparin in Blood: Blood coagulation occurs inside the blood vessels.
  3. Striated Muscle Contraction: Fatigue due to accumulation of lactic acid.

Question 8.

  1. Identify figures A and B .
    HOTS Questions for Class 9 Science Chapter 6 Tissues image - 5
  2. Label X, Y and Z.
  3. Which one acts as impulse booster ?
  4. Which one is under control of our will ?

Answer:

  1. Identification:
    A – Cardiac muscle fibres.
    B – Striated muscle fibre.
  2. X- Intercalated disc.
    Y- Dark band.
    Z- Light band.
  3. Impulse Booster: Intercalated disc.
  4. Control of Will: Striated or skeletal muscle.

Hope given HOTS Questions for Class 9 Science Chapter 6 Tissues are helpful to complete your science homework.

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