Available Answers

1. 1.

   Write true or false. Correct the false statements.

   1. The lamina has a thickened vein along its centre called petiole.
   2. In a simple leaf, the blade is clearly divided into many distinct parts called leaflets.
   3. In alternate arrangement, a set of three or more leaves grows from the same node.
   4. Leaf spines help to reduce the loss of water by transpiration.
   5. The leaves of Opuntia are modified into spines.
2. 2.

   Tick the most appropriate answer.

   1. The point on the stem where a leaf arises is a 
      1. stem.
      2. node.
      3. bark.
      4. trunk.
   2. This lamina has a thickened vein along its centre called the 
      1. veinlet.
      2. petiole.
      3. vein.
      4. midrib.
   3. The lamina has a thickened vein along its centre called the
      1. veinlet.
      2. petiole.
      3. vein.
      4. midrib.
   4. The small, slightly swollen part at the end of petiole is called
      1. leaf base.
      2. leaf blade.
      3. vein.
      4. leaf stalk.
   5. In this type of arrangement, a pair of leaves  arises from the same node but opposite to each other
      1. opposite 
      2. alternate
      3. whorled 
      4. none of these
   6. In a pea plant, the leaf is modified into a thin thread like coiled structure called
      1. thorn.
      2. hook.
      3. spine.
      4. tendril.
3. 3.

   Fill in the blanks.

   1. An ________________ is the angle between the petiole of a leaf and the stem.
   2. In a ________________ leaf, the leaf blade is clearly divided into many distinct parts.
   3. The arrangement of veins and veinlets on the lamina of a leaf is called ________________.
   4. In ________________ venation, veins and veinlets are irregularly distributed over the entire lamina, forming a network.
   5. Scale leaves may be thin and dry as in ________________, or thick and fleshy as in ________________.
4. 4.

   Match the columns.

   1. A leaf with a single leaf blade is a	a. petiole
   2. Points on the stem from which leaves arise	b. midrib
   3. The thickened vein along the centre of a leaf	c. stomata
   4. The minute pores present on the lower surface of a leaf	d. simple leaf
   5. The short, narrow, cylindrical part of a leaf that attaches the leaf blade to the stem	e. nodes

    

5. 5.

   Find the odd one out. Give reasons.

   1. stem, leaves, roots, flowers
   2. flower, lamina, midrib, petiole
   3. leaf base, lamina, midrib, flower
   4. pea plant, pitcher plant, bladderwort, Venus flytrap
6. 6.

   Name the type of leaves present in the following plants.

   rose

   prickly poppy

   mango

   cotton

   neem

   peepal

   Acacia

   gulmohar

    

   Simple leaf	Compound leaf
   1.	1.
   2.	2.
   3.	3.
   4.	4.