Available Answers

1. 1.

   Choose and write the correct answer (MCQs):

   1. The enzyme amylase is present in the ____________.
      1. mouth 
      2. pancreas
      3. liver
      4. stomach
   2. Wool and silk are;
      1. vitamin
      2. protein
      3. mineral
      4. elastic
   3. C+O₂→ CO_2, is a _______________ reaction.
      1. decomposition
      2. oxidation
      3. reduction
      4. displacement
   4. Animals living in the polar regions posses which of these features:
      1. strong tail
      2. long and large beaks
      3. webbed feet
      4. loud voice
   5. During inhalation the ribs _______________.
      1. move upwards
      2. move downwards
      3. do not move
      4. move inwards
2. 2.

   Fill in the blanks:

   1. Venus flytrap is an example of ______________.
   2. ______________ is the reaction between acid and base to form salt and water.
   3. Glowing of a filament bulb is an example of _______________.
   4. ______________ is the process of protecting soil from erosion.
   5. The deposit of clay, sand and silt particles left by a river is called _____________.
   6. The leaves of plants have small pores called _______________.
3. 3.

   Write T for true or F for false:

   1. In our body food is digested and absorbed in the alimentary canal.
   2. One calories is nearly equal to 4.2 Joules.
   3. The fennec fox has short ear to keep itself cool.
   4. The polar bear has the feature of camouflage.
   5. Roots of the plants bind the soil.
   6. The fertility of soil cab be increased by crop rotation.
4. 4.

   What is photosynthesis? Explain in detail.
5. 5.

   Why are some cocoon not boiled during harvesting of silk thread?
6. 6.

   Distinguish between heat capacity and specific heat capacity.