How are the angiosperm woods classified based an seasonal changes.

Explanation

Based on seasonal changes, wood can be classified into diffuse porous and ring porous wood. Diffuse porous wood : Wood in which vessels are uniform in size and distribution throughout an annual ring Eg: Acer
Ring porous wood : Pores of the early wood are larger than those of the late wood. Rings of wide and narrow vessels occur. Eg: Quercus.