Question

Growth in girth is characteristic of dicot stem and a few monocots also show abnormal secondary growth. Choose the WRONG answer from the following.

• A. In old stems, the periderm and secondary phloem constitute the bark
• B. Lenticels are formed at a place where the phellogen -shows more activity than anywhere else
• C. Both heart wood and sap wood include greater part of secondary wood
• D. In anomalous secondary growth, the secondary vascular bundles have phloem around xylem

Answer 1

Answer:

D. In anomalous secondary growth, the secondary vascular bundles have phloem around xylem

• Monocots do not undergo secondary growth.

• If they do increase in girth (like palm trees and yucca plants), it does not result in the development of a secondary xylem and phloem, since monocots don't have vascular cambium.

• An increase in girth without secondary growth is referred to as anomalous thickening.