Sexual Reproduction in Flowering Plants

Topics in this chapter

• Pollination And Outbreeding
• Microsporogenesis And Pollen
• Megasporogenesis And Embryo Sac
• Double Fertilization And Endosperm
• Embryogenesis And Seed Development
• Apomixis And Polyembryony

Cheat sheet

Practice questions

1. Question 1Q-EE85E6

   Which of the following layers of the microsporangium wall nourishes the developing pollen grains and is generally characterized by multinucleate cells with dense cytoplasm?

   1. A.Epidermis
   2. B.Endothecium
   3. C.Middle layers
   4. D.Tapetum
   See the answer and solution
2. Question 2Q-DE8B3D

   The hard outer layer of a pollen grain, known as the exine, is composed of a remarkably resistant organic material called:

   1. A.Sporopollenin
   2. B.Pectin
   3. C.Callose
   4. D.Lignin
   See the answer and solution
3. Question 3Q-56F671

   In a typical angiosperm ovule, the functional megaspore undergoes how many mitotic divisions to form the mature 7-celled, 8-nucleate female gametophyte?

   1. A.1 mitotic division
   2. B.2 mitotic divisions
   3. C.3 mitotic divisions
   4. D.4 mitotic divisions
   See the answer and solution
4. Question 4Q-F0AA61

   Transfer of pollen grains from the anther to the stigma of another flower of the same plant is botanically referred to as:

   1. A.Autogamy
   2. B.Geitonogamy
   3. C.Xenogamy
   4. D.Cleistogamy
   See the answer and solution
5. Question 5Q-F6C186

   Cleistogamous flowers are invariably:

   1. A.Cross-pollinated
   2. B.Wind-pollinated
   3. C.Self-pollinated
   4. D.Insect-pollinated
   See the answer and solution