What causes growth rings in a tree List four contrasting fea

What causes growth rings in a tree? List four contrasting features that can be used to distinguish Pinus wood from Tilia wood.

Solution

Growth ring is the single layer of wood that the plant forms in a year. So by cutting a tree horizontally and counting the number of rings, one can determine the age of tree.

Growth rings are formed due to changes in growth speed of tree during winter , spring, summer and fall . So each ring marks one growing season of tree. If the growing season was long wider ring is seen , if it was dry a thin ring is seen .

Growth ring patterns are affected by climate, weather , rain , ph , plant nutrition, sunlight and CO2 concentration