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Anatomy of Flowering Plants
Secondary Growth – Annual Rings
3 questions from 3 papers, each with its answer.
- questions
- 3
- papers
- 3
- years asked, 2017–2026
- 2 of 10
- of Anatomy of Flowering Plants
- 3.49%
Appears in
Concepts tested
- autumn (late) wood
- Diffuse porous wood in uniform climates
- formation of annual rings
All Questions
2023 1 question
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Assertion: Late wood has fewer xylary elements with narrow vessels.Reason: Cambium is less active in winters.
In winter the cambium is less active and forms fewer xylary elements with narrow vessels (late wood).
In winter, the cambium is less active and forms fewer xylary elements that have narrow vessels, and this wood is called autumn wood or late wood.
2019 1 question
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Which of the statements given below is not true about formation of Annual Rings in trees?
2003 AIPMT 1 question
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Diffuse porous wood is characteristic of those plants which are growing in : -In ring porous wood, vessels of the spring wood are large and those of the autumn wood are small, so distinct annual rings are formed. This occurs in temperate regions, where the climate changes sharply with seasons.
In diffuse porous wood, vessels of about the same size are scattered uniformly throughout the growth ring.
This is typical of plants growing in the tropics, where the climate is uniform throughout the year and cambial activity is nearly constant, so annual rings are not clearly formed.
So diffuse porous wood is characteristic of plants growing in the tropics.