Which of the statements given below is not true about formation of annual rings in trees?

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Annual rings are not prominent in trees of temperate region.

Annual ring is a combination of spring wood and autumn wood produced in a year.

Differential activity of cambium causes light and dark bands of tissue-early and late wood respectively .

Activity of cambium depends upon variation in climate.

answer is A.

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Detailed Solution

Annual rings, which have spring wood and autumn wood in every annual ring, are prominent in temperate plants.
(2), (3) and (4) are true statements.
(2) Each annual ring has a combination of spring wood and autumn wood formed in a year.
(3) Differential activity of cambium causes light and dark band of tissue – early wood and late wood, respectively.
(4) Activity of cambium depends upon variation in climate. It is more active in the spring season as compared to autumn.

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