Question

Autumn wood is distinguishable from spring wood in having

• A. Narrow tracheary elements
• B. Broader tracheary elements
• C. Lighter colour
• D. Cambium

Answer 1

The correct option is A Narrow tracheary elements

In the dicotyledonous trees growing temperate regions, during favorable conditions, large amount of secondary xylem is formed. It is called Spring wood or early wood. It consists of large, thin walled broad tracheary elements. In the unfavorable conditions, less amount of secondary xylem is formed. It is called autumn wood or late wood. It consists of small, thick walled narrow tracheary elements.

So, the correct option is ‘Narrow tracheary elements’.