Available Answers

1. 1.

   Fill in the blanks.

   1. The cell formed by the fusion of the male and female gametes is called the ____________.
   2. Yeast cells produce small outgrowths called ____________.
   3. In grafting, a stock is joined with a ____________
   4. The transfer of pollen grains from anther to stigma is known as ____________.
   5. A new variety obtained by artificial pollination is called a ____________.
   6. The plumule develops into the ____________.
   7. In human beings, fertilisation takes place in the ____________ tube.
   8. The embryo is attached to the placenta by the ____________ cord.
   9. The embryo is protected within the uterus by ____________ fluid.
   10. The whole process of ovulation, thickening of the uterine lining and menstruation is called the ____________ cycle.
   S A M P L E

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   Answer:

   S A M P L E

   1. zygote
   2. budding
   3. scion
   4. pollination
   5. new species
   6. shoot
   7. pollen
   8. umbilical
   10. m...
2. 2.

   Choose the correct option.

   1. Regeneration is seen in

   1. flatworms
   2. Hydra
   3. lizards
   4. all of these

   2. Spores are produced by

   1. fungi
   2. Hydra
   3. rice plants
   4. Amoeba

   3. Which of the following is a rhizome?

   1. Potato
   2. Onion
   3. Ginger
   4. Carrot

   4. Pollen grains are formed in the

   1. anther
   2. pistil
   3. style
   4. filament

   5. Grafting is a method of

   1. artificial pollination
   2. sexual reproduction
   3. artificial vegetative propagation
   4. cross-pollination

   6. The reproductive whorls of a flower are the

   1. calyx and corolla
   2. androecium and gynoecium
   3. calyx and androecium
   4. corolla and gynoecium

   7. Fertilisation is external in

   1. birds and fish
   2. amphibians and birds
   3. reptiles and fish
   4. fish and amphibians

   8. The testes are located in the

   1. ureter
   2. penis
   3. scrotum
   4. vas deferens

   9. Menstruation occurs

   1. after fertilisation
   2. when the ovum fails to get fertilised
   3. when the ovaries stop producing ova
   4. whenever an ovary produces an ovum

   10. The uterus opens into the

   1. ovary
   2. vagina
   3. urethra
   4. ureter
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   Answer:

   S A M P L E

   1. (d) all of these
   2. (a) fungi
   3. (c) Ginger
   4. (a) anther
   5. (c) artificial
   6. (b) an...
   7. ...
   8. ...
   9. ...
   10. ...
3. 3.

   Write true' or 'false'. If false, write the correct statement.

   1. Binary fission gives rise to two daughter cells.
   2. Asexual reproduction results in genetic variation.
   3. The mass of undifferentiated cells formed in tissue culture is called callus.
   4. Corms are found in Gladiolus and saffron.
   5. Layering is used to cultivate ginger.
   6. Plants produced by vegetative reproduction take longer to mature than those produced from seeds.
   7. The gynoecium bears stamens.
   8. The embryo in a germinating seed consists of a plumule and a radicle.
   9. Sperms mature in the epididymis.
   10. Nonidentical twins are formed from a single ovum.
   S A M P L E

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   Answer:

   S A M P L E

   1. true
   2. false The offspring produced by asexual reproduction h...
   3. ...
   4. ...
   5. ...
   6. ...
   7. ...
   8. ...
   9. ...
   10. ...
4. 4.

   What are the major differences between asexual and sexual reproduction?
5. 5.

   Name the various modes of asexual reproduction, giving one example of each kind.
6. 6.

   How does fragmentation differ from regeneration?