Structural Organisation – Morphology of Flowering Plants Quiz - ICSE Class 11 Biology

Free practice quiz: Structural Organisation – Morphology of Flowering Plants (ICSE Class 11 Biology). 43 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 11 Biology practice quiz has 43 multiple-choice questions on Structural Organisation – Morphology of Flowering Plants, and 43 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. Which of the following floral whorls is directly involved in the formation of the fruit?

   1. Calyx
   2. Corolla
   3. Androecium
   4. Gynoecium
   Show answer

   Answer: D. Gynoecium

   The gynoecium, which comprises the pistil (stigma, style, and ovary), is the female reproductive part of a flower. After fertilization, the ovary develops into the fruit.

2. Inflorescence is the arrangement of:

   1. Roots on the stem
   2. Leaves on the stem
   3. Flowers on the peduncle
   4. Branches on the trunk
   Show answer

   Answer: C. Flowers on the peduncle

   Inflorescence describes the specific arrangement of flowers on the floral axis (peduncle) of a plant. It dictates how flowers are clustered or displayed.

3. A flower that has all four floral whorls (calyx, corolla, androecium, gynoecium) is described as:

   1. Incomplete
   2. Complete
   3. Perfect
   4. Imperfect
   Show answer

   Answer: B. Complete

   A complete flower contains all four essential floral organs: calyx (sepals), corolla (petals), androecium (stamens), and gynoecium (pistil).

4. The modification of a leaf into a sharp, pointed structure is called:

   1. Tendril
   2. Spine
   3. Bract
   4. Phyllode
   Show answer

   Answer: B. Spine

   Leaf spines are modified leaves that are sharp and pointed, often serving as a defense mechanism against herbivores. Cacti are a prime example.

5. What is the structure that bears the ovules within the ovary?

   1. Receptacle
   2. Pedicel
   3. Placenta
   4. Style
   Show answer

   Answer: C. Placenta

   The placenta is the part of the ovary to which the ovules are attached. The arrangement of placentas and ovules within the ovary is known as placentation.

More questions in this quiz

Answers and explanations are in the full quiz.

1. A plant with epipetalous stamens would exhibit the stamens attached to:
2. In a typical dicotyledonous flower, the number of parts in each whorl is usually:
3. A flower that has both androecium and gynoecium is termed as:
4. What is the primary function of the calyx in a flower?
5. The arrangement of ovules within the ovary is known as:
6. If a flower has only stamens and no pistil, it is:
7. Which type of placentation is characterized by ovules attached to the central axis in a multilocular ovary?
8. What term describes the arrangement of petals and sepals in a flower bud with respect to each other, where the margins touch but do not overlap?
9. The study of the form and structure of organisms and their specific structural features is known as:
10. In a marginal placentation, the placenta runs along:
11. Which of the following is a modification of a leaf for climbing?
12. The sterile stamens in a flower, often modified into petals, are called:
13. A flower that lacks either stamens or pistil (or both) is called:
14. In which type of aestivation do the margins of the sepals or petals overlap one another in one direction?
15. The fleshy underground stem that stores food and bears scale leaves and buds is a:
16. Which modification of the stem helps in supporting the plant and climbing by wrapping around a support?
17. The placentation where ovules are borne on the inner wall of the ovary, in two alternating rows in a unilocular ovary, is called:
18. A flower that lacks either the corolla or the calyx (or both) is called:
19. The collective term for the stamens of a flower is:
20. Which of the following is a modification of the stem found underground and functions in vegetative propagation?
21. A flower having both stamens and pistils is called a:
22. Which type of placentation is found in a unilocular ovary where ovules arise from the central axis and the ovary is divided by septa, but these septa do not reach the center?
23. The arrangement of flowers on the floral axis is known as:
24. If a flower has only a pistil and no stamens, it is:
25. The part of the stamen that contains pollen is the:
26. The ovule is attached to the placenta by a stalk called the:
27. A modification of the stem that is sharp and pointed, often arising from axillary buds, is called a:
28. The collective term for the petals of a flower is:
29. Which type of aestivation is found in pea and bean flowers, where one petal (standard) overlaps two lateral petals (wings), which in turn overlap two smaller anterior petals (keel)?
30. The sterile outermost whorl of a flower, consisting of sepals, is called the:
31. Which modification of the root serves for anchorage and water absorption, and is typically found in monocots?
32. The modification of a leaf into a hook-like structure for climbing is called a:
33. The presence of both stamens and pistil in the same flower indicates it is:
34. The ovule is protected by one or two structures called:
35. Which floral whorl is often brightly colored to attract pollinators?
36. The joint that attaches the filament to the anther is called the:
37. The swollen basal part of the pistil that contains ovules is the:
38. The arrangement of sepals and petals in relation to each other in the flower bud, before it opens, is known as:

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