Maharashtra State BoardHSC Science (General) 11th
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Answer the following question. While on the trip to Kashmir, Pintoo observed that cut portions of large trees show distinct rings, which he never found in Maharashtra. Why is so? - Biology

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Answer in Brief

Answer the following question.

While on the trip to Kashmir, Pintoo observed that cut portions of large trees show distinct rings, which he never found in Maharashtra. Why is so?

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Solution

  1. Cut portions of large tress show distinct rings which are annual rings formed due to activity of cambium during favourable and non-favourable climatic conditions.
  2. Kashmir falls under the temperate region where the climatic conditions are not uniform through the year. In the spring season, conditions are favourable due to which cambium is active, whereas, in the autumn season, conditions are unfavourable due to which cambium is less active. This leads to the formation of spring wood and autumn wood that appears as alternate light and dark concentric rings, constitute an annual ring or growth ring.
  3. Maharashtra falls under the tropical region where climatic conditions are favourable throughout the year. In tropical areas, the continuous growth of secondary xylem occurs. Thus, trees growing in tropical regions show less or no annual rings as compared to trees in the temperate region.
Concept: Wood
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APPEARS IN

Balbharati Biology 11th Standard Maharashtra State Board
Chapter 8 Plant Tissues and Anatomy
Exercise | Q 2. (E) | Page 95
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