Available Answers

1. 1.

   Fill in the blanks.

   1. The reproductive sex cells are known as _______________.
   2. Multiple fission occurs in certain algae such as _________________ and _______________.
   3. _________________ propagation takes place in plants which do not produce seeds.
   4. _________________ are the organs of vegetative propagation in potato.
   5. Sugarcane and pineapple plants are grown by ________________ method.
   6. In grafting, a stem cutting called _________________ from one plant is attached and tied to the rooted stem called ____________ of another plant.
   7. __________________ is also called micropropagation.
2. 2.

   Why is sexual reproduction considered superior to asexual reproduction?

3. 3.

   Fill in the blanks.

   1. _______________ protects the flower in the bud stage.
   2. The male reproductive part of a flower is called _______________.
   3. Complete flowers are also called ________________ or _______________ flowers.
   4. The single cell formed after fertilization is called ______________.
   5. The fruit is a ripened ___________________ that contains one or more seeds.
   6. Water, a suitable temperature and _________________ are required for seeds to germinate.
4. 4.

   Tick the most appropriate answer.

   1. The simple division of an organism into two smaller daughter cells of roughly equal size is called
      1. binary fission
      2. multiple fission
      3. fragmentation
      4. budding
   2. Which of these can be reproduced by its stem?
      1. carrot
      2. Bryophyllum
      3. rose
      4. papaya
   3. An incomplete flower with only androecium is called a
      1. hermaphrodite flower
      2. pistillate flower
      3. bisexual flower
      4. staminate flower
   4. Flowers which have all the four whorls are called
      1. neutral flowers
      2. staminate flowers
      3. incomplete flowers
      4. complete flowers
   5. Which of the following is an artificial process?
      1. binary fission
      2. budding
      3. grafting
      4. fragmentation
   6. In cross pollination, pollen grains from the anther of a flower are transferred to the stigma of
      1. the same flower
      2. another flower on the same plant
      3. flower of another plant of different species
      4. flower of another plant of same species
   7. A pollen tube grows through the
      1. filament
      2. style
      3. anther
      4. ovary
   8. Seeds are produced from
      1. anthers
      2. ovules
      3. pollen grains
      4. eggs
   9. Fertilization takes place inside the
      1. ovary
      2. ovule
      3. ovum
      4. gynoecium
   10. A plant embryo consists of
       1. cotyledons and embryonal axis
       2. plumule and radicle
       3. plumule and cotyledons
       4. cotyledons, embryonal axis and radicle
5. 5.

   Fill in the blanks.

   1. During unfavourable conditions, some organisms develop a thick protective covering called _____________ around themselves.
   2. The small outgrowth arising from the yeast cell is called a ________________.
   3. The gynoecium consists of ________________, ________________ and ________________.
   4. Pollination taking place between two flowers present on two separate parent plants is called _____________ pollination.
   5. The process by which a dormant embryo becomes active and grows into a new plant is known as _______________.
6. 6.

   Write true or false. Correct the false statements.

   1. Sexual reproduction involves the fusion of an egg cell and a male gamete.
   2. The development of a new plant from the vegetative part of a flowering plant is called fragmentation.
   3. A whole new plant can grow from the eye of a potato tuber.
   4. Cutting and layering are natural methods of asexual reproduction.
   5. A male gamete travels down the pollen tube and fuses with the egg cell inside an ovule.