BotanyAssertion : Flowers of Datura are zygomorphic. Reason: Flowers of mustard can be cut into two equal halves on any radial plane.

Assertion : Flowers of Datura are zygomorphic.
Reason: Flowers of mustard can be cut into two equal halves on any radial plane.

A
Both assertion and reason are correct and reason explains the assertion.
B
Both assertion and reason are correct and reason does not explains the assertion.
C
Assertion is correct and reason is incorrect
D
Assertion is incorrect and reason is correct.

Solution:

In the families brassicaceae (mustard) solanaceae (datura and chillies) and liliaceae (onion, garlic, Gloriosa), the flowers can be cut into two equal parts on any radial plane. Such flowers are described as actinomorphic. A zygomorphic flower is cut into two equal parts on only one radial plane.