What Tissue Makes Up Most of the Wood of a Tree

Question

What tissue makes up most of the wood of a tree?
A)primary xylem
B)secondary xylem
C)secondary phloem
D)mesophyll cells
E)vascular cambium

Accepted Answer

Secondary xylem, also known as wood, makes up most of the bulk of a tree. This tissue is produced by the vascular cambium and is responsible for providing support and transporting water and nutrients throughout the tree. Primary xylem is only present in woody plants during their early growth stages, while secondary phloem is responsible for transporting sugars and other nutrients throughout the tree. Mesophyll cells are found in the leaves of plants and are responsible for photosynthesis.