1 biologya transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How are these rings formed? What is the significance of these rings?
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Each year, the tree forms new cells, arranged in concentric circles called annual rings or annual growth rings. These annual rings show the amount of wood produced during one growing season. ... They form the summerwood (latewood) which appears as a darker ring on the tree cross section.
Each year, the tree forms new cells, arranged in concentric circles called annual rings or annual growth rings. These annual rings show the amount of wood produced during one growing season. ... They form the summerwood (latewood) which appears as a darker ring on the tree cross section.
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Explanation:
➡️ They yearly growth of wood is distinct in temperate trees. It is called annual ring or growth ring. In each ring there is a wide spring or early would of broader light coloured elements and a thinner autumn or late wood of narrow dark coloured element. The two types of wood are formed in response to seasonal condition, favourable in spring and non favourable in autumn.
➡️ Significance -
- Annual or growth rings indicate the age of the plant.
- Changes in annual ring gives clues as to the climatic conditions of the past.
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