Question

The symmetry in which a flower can be divided into two equal and similar halves by only one vertical division is

• A. Actinomorphic
• B. Polymorphic
• C. Metamorphic
• D. Zygomorphic

Hint:

Associate \textbf{Actino}morphic with "acting" like a star or a wheel (radial symmetry) and \textbf{Zygo}morphic with "zygote" or pairing (bilateral symmetry). Zygomorphic flowers have a distinct top and bottom, or left and right, like a human face.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Floral symmetry describes how the parts of a flower are arranged around its center. It is an important characteristic in plant classification. The question asks for the term describing bilateral symmetry.
Step 2: Detailed Explanation:
Let's define the terms related to floral symmetry:


Actinomorphic: This refers to radial symmetry. A flower is actinomorphic if it can be divided into two equal halves by any vertical plane passing through the center. Examples include mustard, datura, and chilli.

Zygomorphic: This refers to bilateral symmetry. A flower is zygomorphic if it can be divided into two similar halves by only one particular vertical plane. Examples include pea, gulmohar, bean, and cassia. The description in the question perfectly matches this definition.

Polymorphic and Metamorphic are not standard terms used to describe floral symmetry.

Step 3: Final Answer:
The symmetry in which a flower can be divided into two equal halves by only one vertical plane is called zygomorphic symmetry.