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Autumn wood can be differentiated from springwood by:
(a)Broad vessels and tracheids
(b)Narrow vessels and tracheids
(c)The red colour of cambium

Last updated date: 20th Jun 2024
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Hint: The wood formed during the winter season is called autumn wood or latewood. In autumn wood, the xylem elements i.e. tracheids and vessels are more thickened due to deposition hence narrower compared to springwood.

Complete answer:

SpringwoodAutumn wood
The cambium is more active during the spring and forms xylem vessels with wider cavities referred to as spring wood or earlywood.The cambium activity decelerates down in the winter season and gives rise to narrow xylem elements referred to as autumn wood or latewood.
It contains plenty of xylem vessels with wider cavities.It contains xylem vessels with narrower cavities.
In springwood, the xylem elements are less thickened.In autumn wood, the xylem elements are more thickened.
Springwood has a small number of fibres.Autumn wood has a lot of fibres.
It has a lower density.It has a higher density.
The springwood is light coloured.Autumn wood is darker coloured.
It occurs at the beginning of an annual ring.It occurs at the end of an annual ring.
Springwood comprises the major part of the annual ring. Autumn wood is a narrow strip in the annual ring.

So the correct answer is “Narrow vessels and tracheids”
Note: Each year, the tree produces new cells that are arranged in concentric circles called annual rings or growth rings. These annual rings display the amount of wood produced during one growing season. The annual ring can be divided into two parts: spring wood and autumn wood.