Morphology Of Flowering Plants Root Stem And Leaf Question 485
Question: Read the assertion and reason carefully:
Assertion : The lenticel is meant for gaseous exchange. Reason : Lenticel checks excessive evaporation of water.
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: B
Solution:
The lenticel is filled up by loosely arranged thin walled rounded and suberised or unsuberised cells called complementary cells.
They enclose intercellular spaces for gaseous exchange.
The complementary cells are formed from loosely arranged phellogen cells and division of sub-stomatal parenchyma cells.
The suberised nature of complementary cells checks excessive evaporation of water.
BETA
