Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

In a flower that has all four floral whorls, which whorls contain male and female reproductive parts?

a. whorls 3 and 4 (stamens and carpels)

b. whorls 1 and 4 (calyx and carpel)

c. whorls 2 and 3 (corolla and stamens)

d. whorls 1, 3 and 4 (calyx, stamens, and carpels)

e. only whorl 4 (carpel)

Summary Introduction


A flower is a reproductive structure found in the flowering plants and is mainly responsible for reproduction. It comprises four main parts: petals, stamen, anther, and pistil. These parts play various roles during and after fertilization. These parts are broadly categorized as accessory parts and reproductive parts. This categorization is based on the role played by the part of the flower.


Justification/ Explanation for the correct answer:

Option (a) is given as whorls 3 and 4 (stamens and carpels). A flower has four major whorls, calyx, corolla, stamen, and carpel. The whorl 1 and whorl 2 comprises the accessory parts of the flower while whorls 3 and 4 comprise the reproductive parts of the flower. The whorl 3 comprises anthers and pollen sac that together forms the male reproductive organs. The whorl 4 contains stigma, style, and ovary, which forms the female reproductive part. The two whorls together contain the complete male and female reproductive parts. Hence, option (a) is correct.

Explanation for the incorrect answers:

Option (b) is given as whorls 1 and 4 (calyx and carpel). The whorl 1 comprises an accessory part of the flower. This whorl is formed by the combination of all the sepals...

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