Available Answers

1. 1.

   Tick mark (√) the correct answers n the following

   1. Insect-pollinated flowers are:
      1. Large
      2. Showy
      3. Aromatic
      4. All
   2. A mature pollen grain has:
      1. Intine
      2. Exine
      3. Both
      4. None
   3. The number of nuclei in an embryo sac is:
      1. 2
      2. 4
      3. 6
      4. 8
   4. The number of nuclei in triple fusion is:
      1. 2
      2. 3
      3. 4
      4. 6
   5. In many bisexual flowers, the anthers and stigma of the same flower mature at different times. This phenomenon is called:
      1. Autogamy
      2. Heterogamy
      3. Dichogamy
      4. Epigamy
2. 2.

   Define pollination.

3. 3.

   State whether the following statements are true or false. If false, write the correct statement by changing the last word printed in bold letters.

   1. The pollen of the same flower falling on its stigma by itself is called allogamy.
   2. The pollen of the anther of another flower of the same plant falling on the stigma is called geitonogamy.
   3. The pollen of a flower of another plant of the same species falling on the stigma is called autogamy.
4. 4.

   Name the following:

   1. Insect-pollinated flower _______________________
   2. Wind-pollinated flower ________________________
   3. The transfer of pollens from the anthers of one plant to the stigma of a flower of another plant __________________________
5. 5.

   How is self-pollination different from cross-pollination?

   Self-pollination	Cross-pollination
   1. ______________________	1. _______________________
   2. ______________________	2. _______________________
   3. ______________________	3. _______________________
   4. ______________________	4. _______________________
   5. ______________________	5. _______________________
   6. ______________________	6. _______________________
   7. ______________________	7. ________________________

    

6. 6.

   Mention three advantages and two disadvantages of cross-pollination.