Sexual Reproduction in Flowering Plants Quiz - ICSE Class 12 Biology

Free practice quiz: Sexual Reproduction in Flowering Plants (ICSE Class 12 Biology). 27 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 12 Biology practice quiz has 27 multiple-choice questions on Sexual Reproduction in Flowering Plants, and 27 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. In angiosperms, what is the primary function of the tapetum during microsporogenesis?

   1. To provide mechanical support to the developing microspores.
   2. To synthesize and secrete nutrients for the developing microspores and pollen grains.
   3. To facilitate the dehiscence of the anther locule.
   4. To absorb excess moisture from the anther.
   Show answer

   Answer: B. To synthesize and secrete nutrients for the developing microspores and pollen grains.

   The tapetum is the innermost layer of the anther wall. Its cells are rich in cytoplasm and often multinucleate. They are responsible for providing nourishment to the developing microspores and pollen grains. The other options describe functions of different anther wall layers (e.g., endothecium for dehiscence) or are not the primary role of the tapetum.

2. What is the ploidy level of the antipodal cells in a mature embryo sac?

   1. Diploid
   2. Triploid
   3. Haploid
   4. Tetraploid
   Show answer

   Answer: C. Haploid

   Antipodal cells are three haploid cells located at the chalazal end of the embryo sac. They are typically ephemeral and their function is not fully understood, though they may play a role in nourishing the embryo sac.

3. Which of the following is a biotic agent of pollination that often involves specific adaptations like nectar guides and scent production?

   1. Wind (Anemophily)
   2. Water (Hydrophily)
   3. Insects (Entomophily)
   4. Birds (Ornithophily)
   Show answer

   Answer: C. Insects (Entomophily)

   Entomophily, or insect pollination, often involves flowers that are colorful, fragrant, and produce nectar. Many insect-pollinated flowers also have specific patterns called nectar guides, which direct insects to the nectar reward, indirectly facilitating pollen transfer. While birds also act as biotic pollinators, the specific mention of nectar guides and scent production is more characteristic of insect pollination.

4. The phenomenon where an embryo develops from the zygote and the endosperm develops from the primary endosperm nucleus is called:

   1. Asexual reproduction
   2. Apomixis
   3. Sexual reproduction
   4. Vegetative propagation
   Show answer

   Answer: C. Sexual reproduction

   Sexual reproduction in flowering plants involves the fusion of male and female gametes (fertilization) to form a zygote, which develops into an embryo. The fusion of a male gamete with polar nuclei forms the endosperm, which nourishes the developing embryo. This entire process is the hallmark of sexual reproduction.

5. The process of formation of pollen grains from the pollen mother cells is called:

   1. Megasporogenesis
   2. Microsporogenesis
   3. Gametogenesis
   4. Oogenesis
   Show answer

   Answer: B. Microsporogenesis

   Microsporogenesis is the process by which diploid microspore mother cells (pollen mother cells) undergo meiosis to produce haploid microspores. These microspores then develop into pollen grains.

More questions in this quiz

Answers and explanations are in the full quiz.

1. The process of pollenkitt synthesis and secretion is primarily attributed to which layer of the anther wall?
2. Which type of placentation is characterized by ovules arranged along the central axis of a multilocular ovary with a single placenta at the base of each locule?
3. Which type of pollination is facilitated by water currents carrying pollen grains directly to the stigmatic surface in submerged aquatic plants like Vallisneria?
4. The structure that develops from the ovule after fertilization and contains the embryo is called:
5. In plants where the anthers dehisce outward, away from the carpels, what type of self-pollination is promoted?
6. The anther wall consists of four layers. Which layer facilitates dehiscence for pollen release?
7. The ovules in a flower are attached to a cushion-like tissue called the placenta. The arrangement of ovules within the ovary is known as:
8. A plant exhibits protogyny. This means that:
9. The development of a diploid embryo from a diploid egg cell without fertilization is known as:
10. In a dicotyledonous plant, the integuments of the ovule develop into the seed coat. The outer and inner integuments, respectively, typically form:
11. Which type of placentation is found in peas, where ovules are arranged along a single suture on one side of the ovary?
12. The fusion of a male gamete with the polar nuclei of the central cell is part of which process?
13. Which of the following floral characteristics is typical of entomophilous flowers pollinated by birds?
14. In basal placentation, how are the ovules typically arranged?
15. The process by which the embryo sac develops from a megaspore mother cell is:
16. In what type of placentation are ovules arranged on the inner walls of the ovary or on the periphery?
17. Which term describes the development of a fruit from the ovary wall without fertilization?
18. Which of the following floral parts are directly involved in the process of double fertilization in angiosperms?
19. Which layer of the anther wall is primarily responsible for providing nourishment to the developing microspores and pollen grains?
20. In which type of placentation are the ovules arranged on a central axis, and the ovary is divided into several compartments by septa?
21. What is the ploidy level of the zygote formed after fertilization in an angiosperm?
22. Which of the following is a result of the fusion of the second male gamete with the two polar nuclei?

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