Available Answers

1. 1.

   Tick mark (√) the correct answers in the following

   1. The organelles transports the substance within the cell:
      1. Lysosome
      2. Nucleus
      3. Endoplasmic reticulum
      4. Chromosomes
   2. The tissue which connects bones to muscles:
      1. Tendon
      2. Ligament
      3. Blood
      4. Cartilage
   3. The tissue which makes a person fat:
      1. Areolar
      2. Blood
      3. Lymph
      4. Adipose
   4. The plant tissue which transports prepared food material from the leaves to other parts of the plant is
      1. Xylem
      2. Phloem
      3. Parenchyma
      4. Sclerenchyma
   5. A tissue can be best defined as
      1. A group of structurally similar cells,
      2. A group of functionally similar cells
      3. A group of similar cells to perform a specific function
      4. A group of structurally dissimilar cells performing a similar function.
   6. The tissue associated with the upward movement of water and minerals absorbed from the soil by the roots to other parts of the plant, is
      1. Parenchyma
      2. Phloem
      3. Xylem
      4. Collenchyma
   7. The tissue associated with the downward movement of food from the leaves to various parts of the plant, is
      1. Phloem
      2. Xylem
      3. Parenchyma
      4. Collenchyma
2. 2.

   Distinguish between each of the following pairs on the basis of words indicated in the brackets.

   1. Parenchyma and collenchyma (inter-cellular space)
   2. Xylem and phloem (function)
3. 3.

   Identify the kind of tissues, with the clues given below in the box and write their one location in plant or animal body.

   S.No.	Clues about tissues	Tissue	Location
   1.	Dead cells, thick walls due to the deposition of lignin.	_______________	_________________
   2.	Responsible for increase in the diameter of the stem.	_______________	_________________
   3.	Striated, comparatively short and branched cells.	_______________	_________________
   4.	Concerned with the perception and responses of animals	_______________	_________________
   5.	Acts as an insulation for retaining the body heat.	_______________	_________________

    

4. 4.

   The epidermis of leaves secretes a waxy water-proof material. What purpose is served by this secretion?

5. 5.

   State five characteristics of a meristematic tissue.

6. 6.

   State whether the following statements are true (T) or false (F) :

   1. Sclerenchyma tissues are made up of thin walled cells.
   2. Meristematic tissues consist of dividing cells.
   3. Meristematic cells have vacuoles.
   4. Parenchymatous tissues are made up of thick walled cells.
   5. Xylem vessels have pits.
   6. Unicellular animals lack cell differentiation.
   7. A group of cells similar in structure and function is called an organ.
   8. Some plants have organs as in animals.
   9. An organ is a group of cells and tissues.
   10. The animal tissues and the plant tissues are similar in structure and function.
   11. A ligament joins bones to bones.
   12. Striated muscles are always to involuntary nature.