Question

Flower of Hibiscus is
A)Actinomorphic and epigynous
B)Actinomorphic and hypogynous
C)Zygomorphic and hypogynous
D)Zygomorphic and epigynous

Answer 1

Hint: 1)The Malvaceae genus has Hibiscus rosa-sinensis.
2)It is characterized by a complete, actinomorphic and hypogynous flower.

Complete answer:
If the flower is broken into two different sections in each vertical axis, it is called an actinomorphic flower. The flower is called hypogynous if petals, sepals and stamens are located below the ovary, and the ovary in this condition will be superior like in case of mustard, Chinarosa, Brinjal.
Zygomorphic flower - A flower capable of being divided by a line passing through the center of a flower into only two identical parts (mirror images), i.e. other lines passing through the center of a flower would not give images of each other in a mirror; the same would be monosymmetric, bilateral symmetric, irregular flowers and the reverse would be actinomorphic, monosymmetric, radial symmetric.
For eg, orchids, snapdragons, and sweet peas.
The hypanthium is fused to the gynoecium in epigynous flowers, and the free parts of the sepals, petals, and stamens tend to be connected, as in the apple, to the top of the gynoecium (Malus; Rosaceae); the ovary is inferior, and the petals, sepals, and stamens.

The genus is very broad, containing several hundred species that are native throughout the world to warm temperate, subtropical and tropical regions. Member species are known for their large, showy flowers and are generally referred to simply as 'hibiscus,' or less frequently referred to as rose mallow. Other names include hardy hibiscus, sharon rose, and hibiscus tropical.

Hence, the correct answer is option (B)

Note: Three classifications exist: hypogynous, perigynous, and epigynous. (a) hypogynous, where sepals, petals and stamens are attached below the ovary to the receptacle. (c) epigynous, where sepals, petals and stamens derive from the upper part of the ovary or from a hypanthium positioned above the ovary.