Available Answers

1. 1.

   Write T for True and F for False.

   1. Sepals attract insects.
   2. Petals are green.
   3. Petals are the showy part of a flower.
   4. Carpel and stamens are involved in seed formation
2. 2.

   Arrange the statements in the correct sequence by numbering them to show the formation of a seed.

   1. Seed is formed.
   2. Pollen tube is formed.
   3. Pollination occurs.
   4. Pollen tube grows through the style.
   5. Contents of pollen tube mix with the ovule.
3. 3.

   Look at the pictures shown here and note down the ways in which plants are useful to us.

   

4. 4.

   Choose the correct option. (MCQs)

   1. Why is water needed for germination to occur?
      1. It cleans the seed.
      2. It wets the seed.
      3. It makes the seed swell up.
      4. It allows stored food in cotyledons to become available for use by the embryo.
   2. Air is necessary for germination ______________.
      1. to make the seed lighter
      2. to allow the seed to float
      3. to allow stored food to be used for release of energy
      4. to make water aerated
   3. Warmth is needed for germination because ______________.
      1. it helps in the growth of the seed
      2. it makes the seed comfortable
      3. it makes the seed absorb soil
      4. it is better to be warm than to be cold
   4. Which is not true of flowers?
      1. Reproductive parts of a plant
      2. Change into fruit
      3. Contain seeds
      4. Attractive
   5. Which among the following is not required for germination of seeds?
      1. Water
      2. Air
      3. Sunlight
      4. Pressure
5. 5.

   Write the missing words to complete each of the following:

   1. Sepals help protect the ___________, while petals help ___________.
   2. Carrot grows from a root, while potato grows from a ___________.
   3. Pollen grains are found in anther, while ovule is found in ___________.
   4. Seed coat is the seed covering, while micropyle is the ___________.
   5. The reproductory parts in a flower are ___________ and ___________.
6. 6.

   Draw well labelled diagram of parts of a flower.