Question

Read the assertion and reason carefully to mark the correct option in question.

Assertion: Datura, mustard and chilli shows actinomorphic/bilateral symmetry.

Reason: These flowers can be divided into two similar halves only in one particular vertical plane.

• A. If both assertion and reason are true but reason is not the correct explanation of the assertion.
• B. If assertion is true but reason is false.
• C. If both assertion and reason are false.
• D. If both assertion and reason are true and the reason is the correct explanation of the assertion.

Answer 1

The correct option is C If both assertion and reason are false.

Actinomorphic flowers are those flowers which can be divided into two equal halves along any plane of symmetry passing through the central axis. These flowers show radial symmetry, and not bilateral symmetry. For example, Datura, mustard and chilli.

Those flowers which can be divided into two equal halves (right and left) only along a single plane of symmetry passing through the central axis are known as zygomorphic flowers. For example, Cassia and gulmohur.

Hence, both assertion and reason statements are incorrect.