Question
Biology Question on The Tissue System
Tissue present in an annual ring is:
A
secondary xylem and secondary phloem
B
primary xylem and primary phloem
C
secondary xylem only
D
primary phloem and secondary xylem
Answer
secondary xylem only
Explanation
Solution
The annual rings are formed by secondary xylem because the growth in spring and autumn seasons forms spring and autumn wood which constitute the annual rings by which age of plant can be estimated.