Secondary Growth in Stem
Secondary Growth in Stem: Overview
This topic covers concepts, such as Medullary Ray, Phellem, Phelloderm, Lenticels, Vascular Cambium, Formation of Cambial Ring, Activity of the Cambial Ring, Secondary Phloem, Spring Wood, Autumn Wood, Phellogen, Periderm, Bark, Tyloses, etc.
Important Questions on Secondary Growth in Stem
Cork cambium results in the formation of cork which becomes impermeable to water due to the accumulation of
Fascicular cambium is the cambium of a vascular bundle of:
What are the functions of medullary rays ?
What is the position of oldest secondary phloem?
Which of the following is a part of periderm?
a. Cork
b. Secondary phloem
c. Intrafascicular cambium
d. Primary xylem
Heartwood differs from sapwood in
Which of the following is an incorrect difference between heartwood and sapwood?
State true (T) or false (F) to the given statements and select the correct option.
(a) Annual rings are distinct in plants growing in temperate regions.
(b) Lenticels occur in most woody trees and permit the exchange of gasses.
(c) Due to stelar secondary growth central cylinder of wood surrounded by secondary phloem is formed.
(d) The cells of the endodermis opposite to protoxylem divided to give rise to vascular cambium in dicot roots.
Bark refers to all tissues exterior to the
The feature which is common to both heartwood and sapwood is
Besides phellem, phellogen, root periderm comprises of
The heartwood cannot conduct water because of
Which of the following is the function of heartwood?
Growth rings are generally well marked in trees growing in
What is the role of medullary rays in plants?
