Morphology Of Flowering Plants Root Stem And Leaf Question 486
Question: Read the assertion and reason carefully:
Assertion : Xerophytic leaves may contain stomatal crypts or sunken stomata. Reason : Spongy parenchyma is more in xerophytic leaves.
Options:
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
Show Answer
Answer:
Correct Answer: C
Solution:
In xerophytic leaves, spongy parenchyma is reduced.
Palisade parenchyma may occur on both upper and lower sides with spongy parenchyma sandwiched between the two, e.g., Nerium.
In Nerium or Oleander, the lower surface bears deep depressions called crypts (stomatal crypts).
The crypts possess a number of cutinised cells and stomata.
In other xerophytic plants, stomata occur individually and are sunken below the surface due to their being overtopped by accessory or subsidiary cells.
BETA
