Question: 135 Identify the correct statements :
A. Lenticels are the lens-shaped openings permitting the exchange of gases.
B. Bark formed early in the season is called hard bark.
C. Bark is a technical term that refers to all tissues exterior to vascular cambium.
D. Bark refers to periderm and secondary phloem.
E. Phellogen is single-layered in thickness.
Choose the correct answer from the options given below :
(1) A, B and D only
(2) B and C only
(3) B, C and E only
(4) A and D only
Answer: Option (4)
Explanation:
Lenticels are lens-shaped openings present in the bark that allow exchange of gases between the
internal tissues and the atmosphere, so statement A is correct.
Bark formed early in the growing season is called soft bark,
while bark formed later is called hard bark, so statement B is incorrect.
Bark commonly refers to secondary phloem along with periderm and not to all tissues exterior to the
vascular cambium in functional usage, so statement C is considered incorrect.
Bark includes periderm and secondary phloem, hence statement D is correct.
Phellogen or cork cambium is usually multilayered, not single-layered,
so statement E is incorrect.
Therefore, the correct statements are A and D only.
Hence, Option (4) is the correct answer.