question_answer 51)

  Trunks of some of the aged tree species appear to be composed of several fused trunks. Is it a physiological or anatomical abnormality? Explain in detail.

Answer:

                   It is anatomical abnormality. It is an abnormal type of secondary growth, where a regularvascular cambium or cork cambium is not formed in its normal position. In case of old treetrunks, anomalous secondary growth produces cortical and medullary vascular bundles. Thus, the additional or accessory vascular bundles given appearance of several fusedtrunks.