NEET2023BotanyAnatomy of Flowering PlantsActual
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:
Options
- AB and C only
- BB, C and E only
- CA and D only
- DA, B and D only
Correct answer
C. A and D only
Step-by-step solution
During secondary growth in stem, meristematic tissue called cork cambium develops, usually in the cortex region. Phellogen is a couple of layers thick. Bark is a non-technical term that refers to all tissues exterior to the vascular cambium, therefore including secondary phloem. Bark refers to a number of tissue types, namely periderm and secondary phloem . Bark that is formed early in the season is called early or soft bark . Towards the end of the season, late or hard bark is formed. Lenticels are lens-shaped ope