Exemplar Problems

Question:

Explain the process of secondary growth in dicot stems.

Answer:

Secondary growth in dicot stems involves the thickening of the stem and is facilitated by the vascular cambium. The vascular cambium, located between the primary xylem and phloem, becomes active and starts producing new cells. Cells on the inner side of the cambium differentiate into secondary xylem, while those on the outer side form secondary phloem. This process results in an increase in stem girth. Additionally, the cork cambium replaces the epidermis with a tougher bark, adding further protection and support.