Biology
Assertion (A): Calyx and corolla are considered as non-essential (or accessory) parts of a flower because they do not participate in the process of reproduction at all.
Reason (R): Calyx and corolla are not useless. They protect the reproductive parts of the flower. Corolla attracts insects for pollination which is the first step of reproduction.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Answer
Both A and R are True.
Reason — Calyx and corolla are called non-essential or accessory floral parts because they do not directly take part in reproduction (unlike androecium and gynoecium). While they do not participate directly in reproduction but the calyx protects the flower bud and corolla attracts insects for pollination, which aids reproduction.
Related Questions
Assertion (A): The kind of androecium in which the stamens are united in one group by their filaments is termed as Monadelphous.
Reason (R): Monadelphous stamens are found in Pea and Bombax flowers.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): The most attractive, colourful part of a flower is calyx.
Reason (R): Calyx is the whorl of sepals which protects the young flower bud. Calyx, when green, also performs photosynthesis.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Match the parts in column A with the flowers or parts of flower in column B.
Column A Column B Polyadelphous Polypetalous Pollen grains Calyx, corolla Free petals Nectar Non-essential Bombax Sweet fragrant fluid Pollen sac Given below is the generalized structure of a bisexual flower showing its various parts. Match the structures marked (a) to (e) with their correct functions:
Example: (f)-6: Bears all the floral whorls.