Flower Structure Revisited — Unsolved Practice Set
Chapter: Sexual Reproduction in Flowering Plants | Topic: Flower Structure Revisited
FLOWER STRUCTURE REVISITED — UNSOLVED PRACTICE SET
Topic: Flower Structure Revisited
Multiple Choice Questions
Q1. Which of the following is the site of megasporogenesis in a flower?
- Anther
- Ovule
- Stigma
- Filament
Q2. The point of attachment of the ovule to the placenta is called:
- Micropyle
- Funicle
- Chalaza
- Hilum
Q3. A typical anther is usually bilobed and contains how many microsporangia?
- Two
- Four
- Six
- Eight
Q4. In an anatropous ovule, the micropyle lies close to:
- Chalaza
- Funicle
- Both funicle and hilum
- None of these
Q5. The outer protective covering(s) of an ovule are called:
- Integuments
- Nucellus
- Perianth
- Tepals
Short Answer Questions
Q6. Why is a typical angiosperm anther described as "dithecous"? Explain briefly.
Q7. Differentiate between hilum and chalaza in an ovule, with the help of a simple example.
Q8. A student observes a flower in which the calyx and corolla look identical in colour and shape. What are such undifferentiated perianth parts called? Give one example of such a flower.
Q9. Mention any two functions of the integuments of an ovule.
Long Answer Questions
Q10. Describe, in words, the parts of a typical angiosperm ovule, clearly mentioning the position of the nucellus, the embryo sac, and the micropyle.
Q11. Explain the structure of a mature anther with reference to the arrangement of its microsporangia and wall layers, and describe the role played by the tapetum.
APPLICATION / ANALYSIS
Q12. A gardener notices that in a particular flower species, the ovule bends through 180° during development, so that the micropyle ends up lying right next to the funicle. Identify the type of ovule this is, and justify your answer based on how ovule curvature is classified.
Q13. While examining a cross-section of a pea flower's ovary, a student notices ovules attached along the margin of a single carpel. Which type of placentation does this represent? Explain how the type of placentation is determined by the position of ovules on the placenta.