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UPSC 2011: When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because
(a)Water from soil cannot rise to aerial parts
(b)Roots are starved of energy
(c)Tree is infected by soil microbes
(d)Roots do not receive oxygen for respiration
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Not attemptedCorrect Answer: (b) Roots are starved of energy
Removing a ring of bark severs the phloem so photosynthates cannot move from the leaves to the roots; deprived of carbohydrates, the roots die and the whole tree eventually perishes. Water transport through xylem (a), microbial infection (c) and root aeration (d) are not the primary causes. ([testbook.com](https://testbook.com/question-answer/when-the-bark-of-a-tree-is-removed-in-a-circular-f--601fd4b996baa2d39ced746b?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2011 Science & Technology question?▼
The correct answer is option (b): Roots are starved of energy. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Biology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2011, GS Paper 1, as Question 18. It falls under Science & Technology > Biology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Biology?▼
UPSC has asked 97 questions from Biology (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.