Question 16
Growth and DevelopmentSecondary thickening is initiated in a dicotyledonous stem by the
- A.xylem parenchyma
- B.secondary phloem
- C.endodermis
- D.cambium.
Show the answer and explanation
Answer: D (cambium.)
Explanation
Cambium cells divide to form a complete ring that produces new xylem inwards and new phloem outwards, which thickens the stem.