Available Answers

1. 1.

   Tick the most appropriate answer.

   1. Root hairs are found in the outermost layer of root called.
      1. dermis.
      2. epidermis.
      3. cortex.
      4. xylem.
   2. In phloem, the direction in which translocation of food takes place is
      1. downwards.
      2. upwards.
      3. both upwards and downwards.
      4. none of these
   3. Water is absorbed by the root hair cells through
      1. osmosis.
      2. active transport.
      3. transpiration.
      4. ascent of sap.
   4. The movement of salt or mineral molecules from a region of their higher concentration to a region of their lower concentration is called
      1. osmosis.
      2. active transport.
      3. diffusion.
      4. blending.
   5. The fluid containing mineral salts and water enclosed in a vacuole of a cell is called
      1. cytoplasm.
      2. nucleoplasm.
      3. cell sap.
      4. tonoplast.
   6. The pressure developed in roots due to the continuous inflow of water which pushes the sap upwards is called
      1. root pressure.
      2. sap pressure.
      3. transpiration pull.
      4. stem pressure.
   7. The loss of water vapour through the stomata of the leaves is called
      1. wilting.
      2. translocation.
      3. transpiration.
      4. transportation.
   8. Transpiration occurs through openings in leaves called
      1. pores.
      2. guard cells
      3. stomata.
      4. barks.
2. 2.

   Fill in the blanks.

   1. Water in xylem moves only in _____________ direction.
   2. _______________ is a plant tissue which conducts water and minerals from roots to upper parts of the plant.
   3. _________________ is the food-conducting tissue in plants.
   4. _________________ are multicellular, thin-walled outgrowths of roots.
   5. Roots absorb minerals by _________________ and ______________.
   6. The upward movement of sap through the xylem is called _______________.
   7. There is a direct relationship between absorption and _______________.
   8. ___________________ is an example of a macro-nutrient.
3. 3.

   Define osmosis.

4. 4.

   Define Diffusion.

5. 5.

   Define Active transport.