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Secondary Growth

Question

An annual ring has

Easy

A

a ring of sap wood and a ring of autumn wood
B

a ring of early wood and a ring of spring wood
C

a ring of heart wood and a ring of sap wood
D

a ring of spring wood and a ring of autumn wood formed in a year.

Solution

In plants growing in regions with much seasonal variations there is formation of annual rings. Each annual ring has one ring of spring wood or early wood and ring of autumn wood or later wood. These two together constitute an annual ring. by counting the annual rings one can estimate the age of the plant.

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