What is scaling? Removing bark from a tree
Cutting down trees for timber
Measuring wood for harvesting timber
A survey of the number of trees in a forest

measuring wood

Explanation:

for harvesting timber

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands