Many plants in the marshy region had upwardly growing roots. They could be better seen during low tide.

Statement (A) The meristem that occursin the mature regions of roots and shoots of many plants is called the secondary or lateral meristem. (B) Fascicular cambium, interfascicular cambium and cork-cambium are examples of lateral meristems. (C) These are responsible for producing the secondary tissues.

While observing a section many scattered vascular bundles could be seen. Teacher said but in spite of this large number the stem cannot grow in girth. Why?