Question
Biology Question on Secondary Growth
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:
A and D only
A, B and D only
B and C only
B, C and E only
A and D only
Solution
A. Lenticels are indeed the lens-shaped openings in the bark that allow the exchange of gases.
D. Bark does refer to periderm and secondary phloem.
The other statements are incorrect:
B. Bark formed early in the season is called "soft bark," not "hard bark."
C. Bark technically refers to all tissues exterior to the vascular cambium, including secondary phloem, periderm, and the cork cambium.
E. Phellogen, also known as the cork cambium, is multiple-layered, not single-layered.
Therefore, The correct option is (A): A and D only