Question

Assertion: A simple leaf has an undivided lamina
Reason: Leaves showing pinnate and palmate venation have various type of incision
A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer 1

Hint: The pattern in the arrangement of veins in the blade of a leaf is known as venation. Undivided lamina is found in the simple leaves. The incisions are known with different names depending on their pinnate or palmate venation.

Complete answer: Analysing the assertion: A single or undivided lamina leaf is referred to as a simple leaf. So, the assertion is true.
Analyzing the reason: There may be various types of incisions in the lamina that can reach up to half, more than half or near base or midrib. Pinnatifid, palmatifid, pinnatipartite etc. –these are some types of incisions, based on the pinnate or palmate venation.

So, the correct option is B. both the assertion and reason are true but the reason is not a correct explanation of the assertion

Additional information: Venation is the phenomenon of the arrangement of veins in the lamina of the leaf surface.
It is of three types, reticulate, parallel, and furcate venation.
In reticulate venation, veins form the network-like structure.
For example, leaves of dicot plants (Sunflower)

Note: Most of the angiosperms with two cotyledons in the seed exhibit reticulate venation. Banana, Coconut, Wheat, Maize., and most monocotyledons are examples of parallel venation.