Question
Biology Question on Anatomy of Dicotyledonous and Monocotyledonous Plants
Annual rings are the bands of
A
secondary cortex and cork
B
all secondary vascular tissue
C
secondary xylem and xylem rays
D
secondary phloem and medullary rays
Answer
secondary xylem and xylem rays
Explanation
Solution
The annual rings appear like concentric bands and can be counted to age-date the tree. The rings consists of secondary xylem and xylem rays. The darker wood is called heartwood, while the lighter wood is called sapwood.