Advertisements
Advertisements
Question
A transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How are these rings formed? What is the significance of these rings?
Advertisements
Solution
The growth rings in the trunk of the tree are formed by a cambial ring due to secondary growth. Each ring contains earlywood and latewood. Secondary growth occurs in dicot trees due to the activity of cambium which is a meristematic tissue. The concentric growth rings are called annual rings.
APPEARS IN
RELATED QUESTIONS
Explain the process of secondary growth in stems of woody angiosperm with help of schematic diagrams. What is the significance?
Initiation of lateral roots and vascular cambium during the secondary growth takes place in
Select the correct pair.
Select the correct pair.
Select the correct pair.
In conifers fibres are likely to be absent in ______.
What constitutes the cambial ring?
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.
Write the function of:
Interfasicular cambium
Deciduous plants shed their leaves during summer or in autumn. This process of shedding of leaves is called abscission. Apart from physiological changes what anatomical mechanism is involved in the abscission of leaves.
Is Pinus an evergreen tree? Comment.
Distinguish between the following:
Interfasicular cambium and intrafasicular cambium
