A) differentiating
B) maturing
C) elongating
D) widening
Correct Answer: C
Solution :
Protoxylem is the first formed xylem in which the lignification begins before the completion of elongation. It is constituted of small tracheids and vessels possessing annular or spiral thickenings. They are capable of stretching in the times of need.You need to login to perform this action.
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