Which of the following is correct about flower? A....

Which of the following is correct about flower? A. Reproductive unit in angiosperm. B. Calyx and corolla are reproductive organs. C. Typical flower has four kinds of whorls. D. Whorls arranged successively on thalamus or receptacle. (a) All except $\mathrm{C}$ (b) All except D (c) All except $\mathrm{B}$ (d) All except $\mathrm{A}$

Which of the following is correct about flower?
A. Reproductive unit in angiosperm.
B. Calyx and corolla are reproductive organs.
C. Typical flower has four kinds of whorls.
D. Whorls arranged successively on thalamus or receptacle.
(a) All except $\mathrm{C}$
(b) All except D
(c) All except $\mathrm{B}$
(d) All except $\mathrm{A}$

Key Concepts

Angiosperm Reproductive Structure

This concept explains that in flowering plants (angiosperms), the flower functions as the reproductive unit. It houses the organs necessary for sexual reproduction, such as stamens and carpels, which are involved in the production and fertilization of gametes.

Floral Morphology

Floral morphology refers to the study of the structure and form of flowers. Typically, a flower is composed of distinct parts arranged in a radial fashion, each with specialized functions. These parts can include whorls of sepals, petals, stamens, and carpels.

Floral Whorls

The concept of floral whorls describes the arrangement of floral parts in concentric circles around a central axis. In most typical flowers, there are four types of whorls—sepals, petals, stamens, and carpels—which reflect the organized structure of the flower.

Receptacle (Thalamus)

The receptacle, also known as the thalamus, is the part at the base of a flower where all the whorls are attached. It serves as the foundation for the flower's structure by supporting the sequential arrangement of the various floral parts.

Calyx and Corolla

This concept distinguishes between the calyx and corolla, which are the outermost whorls of the flower composed of sepals and petals respectively. Although they play important roles in protecting the developing flower and attracting pollinators, they are generally not considered the primary reproductive organs, unlike the stamens and carpels.

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