Question

What is true about heartwood?
(a) It does not help in water conduction
(b) It is also called alburnum
(c) It is dark in colour but is very soft
(d) It has tracheary elements which are filled with tannins, resins, etc.

• A. b, c, d
• B. a, b, c
• C. b, d
• D. a, d

Answer 1

Answer: (D)

a, d

A)It does not help in water conduction - True, because of the presence of tyloses.

B)It is also called alburnum - False, sapwood is also called alburnum.

C)it is dark in colour but is very soft - False, Heat wood is rough in nature.

D)it has tracheary elements which are filled with tanins, resins,etc - True, because, the vessels of heartwood are filled with dark coloured extractives, includes, tannins, resins, gums, phenols, oils, etc.

So, the correct option is 'a,d'.