In old dicot stems,a major part of the wood i | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In older dicot stems,the secondary xylem in the central or innermost region becomes dark brown due to the deposition of organic compounds like tan

Vedclass · Accepted Answer

Heart wood

Vedclass · Answer

(B) In older dicot stems,the secondary xylem in the central or innermost region becomes dark brown due to the deposition of organic compounds like tannins,resins,oils,gums,aromatic substances,and essential oils. These substances make the wood hard,durable,and resistant to the attacks of microorganisms and insects. This region is known as heartwood or duramen. It does not conduct water but provides mechanical support to the stem.

In old dicot stems,a major part of the wood is filled up with tannins,resins,gums,etc. This part of the wood is called:

Similar Questions

Lenticels are involved in:

Grafting cannot be done to monocots because they lack

Give one basic functional difference between phellogen and phelloderm.

Grafting is not possible in monocots because they

Assertion: In the stem,the pericycle takes an active part in secondary growth.
Reason: In dicots,the pericycle has the capacity to produce lateral roots.

Vedclass Test Series

Exam Paper Generator

Online Exam Module