First slide

Secondary Growth

Question

An annual ring is formed by

Easy

A

Two consecutive rings of springwood
B

Two consecutive rings of autumn wood
C

a ring of springwood and a ring of autumn wood formed in the same year
D

Two alternate rings of sapwood and heartwood

Solution

The springwood or early wood is lighter in colour and has a lower density whereas the autumn wood is darker and has a higher density. The two kinds of woods that appear as alternate concentric rings formed in a year, constitute an annual ring.

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