Anatomy of Flowering PlantsHard
Question
As the secondary growth takes place (proceeds) in a tree, thickness of
Options
A.heaetwood increases
B.sapwood increases
C.both increase
D.both remain the same
Solution
As a result of coatinous secondary growth in sebsequent year, the older of secondary xylem becomes non-functional. Due to this activities of vessels become blocked by bladder- like ingrowths, which are called tyloses. Due to this the non-function xylem form hard and blackish in colour called duramen or heart wood. Now the function of secondary xylem is continous by younger rings called sapwood or alburnum with this passage of time and addition of new outer rings of secondary xylem more rings of sap-wood changes into heart wood. This is why the heart wood increases in diameter year after year but the sup wood remains almost in the same thickness.
Create a free account to view solution
View Solution FreeMore Anatomy of Flowering Plants Questions
Cortex and pith are not distinguished in...You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you u...For a critical study of secondary growth in plants, which one of the following pairs is suitable ?...Vascular bundles in the stem of Lagenaria and Cucurbita are...The quirescent centre in root meristem serves as a...