Available Answers

1. 1.

   Fill in the blanks.

   1. A _____________ is the basic unit of life.
   2. Living beings that have many cells are called ______________ organisms.
   3. Green plants make food from water and carbon dioxide in the presence of _____________.
   4. ____________ respiration involves breaking down of food in each cell using the oxygen taken in.
   5. The movement of animals from one place to another is called ______________.
   6. Flowers of the ___________ plant change their position to face the sun.
2. 2.

   Fill in the blanks.

   1. The reaction which an organism produces towards a stimulus is called __________.
   2. The stem of a plant grows towards the source of __________.
   3. The ____________ of an organism is the time between its birth and death.
   4. The average life span of a cat is ____________ years.
   5. _____________ is the condition when living beings are no longer alive.
3. 3.

   Tick the most appropriate answer.

   1. A unicellular organism is made up of
      1. only one cell
      2. no cell
      3. many cells
      4. two cells
   2. Green plants are
      1. non-living
      2. autotrophs
      3. heterotrophs
      4. dead
   3. Human beings give out carbon dioxide through their
      1. lungs
      2. ears
      3. kidneys
      4. heart
   4. The average life span of human beings is
      1. 70-80 years
      2. 20-30 years
      3. 100-150 years
      4. 20-40 years
   5. Reproduction is a characteristic feature of
      1. plants only
      2. animals only
      3. living beings
      4. non-living things
4. 4.

   Fill in the blanks.

   1. A living being is made up of ____________.
   2. Animals depend on plants and other animals for their food and are called ___________.
   3. Removal of waste from the body of a living organism is known as ____________.
   4. The movement of animals from one place to another is called ____________.
   5. Living beings respond to ____________.
   6. The life span of an organism is the time between its ____________ and __________.
5. 5.

   List any two characteristic features of living organisms.

6. 6.

   Write two differences between unicellular and multicellular organisms.