1.

Differentiate between: (i) Early wood and late wood (ii) Heart wood and sap wood

Answer»

(i) Differences between early wood and late wood:

S. No.Early WoodLate Wood
(i)It is produced during the favourable period of the year.It is formed towards the close of the active growing period of the year just before the arrival of unfavourable period
(ii)Early wood constitutes the major part of the annual ring.Late wood forms a narrow strip in the annual ring.
(iii)The wood is lighter in colour.The wood is darker.
(iv)It has lower density.It has higher density.

(ii) Difference between heartwood and sapwood.

S. No.HeartwoodSapwood
(i)It is the central wood of an old stem.It is outer wood of an old stem.
(ii)Heartwood is dark coloured.It is light coloured.
(iii)Living cells are absent.Living cells are Present.
(iv)Tracheary elements have deposition of tannins, resins, gums etc.Tracheary elements do not possess any deposition in their lumen.


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