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Why thickness of the stem increases as a...

Why thickness of the stem increases as age advances in dicot plants?

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As the dicot trees grow older, formation of secondary vascular tissue takes place due to secondary growth. Due to secondary growth, secondary xylem and phloem take place hence thickness of the stem increases.
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PEARSON IIT JEE FOUNDATION-TISSUES -MASTERING THE CONCEPTS (APPLICATION AND ANALYSIS )
  1. Few cells of plant tissue are known as collocytes. Give their characte...

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  2. What happens when the tree gets injured? Name the structures responsib...

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  3. Why thickness of the stem increases as age advances in dicot plants?

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  4. Why heartwood is considered more durable than the sapwood?

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  5. Sieve tubes do not have nuclei, why are they considered as living cell...

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  6. Cuticle is absent on epidermis of roots. Give reason.

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  7. Vascular tissue is responsible for survival of plants in terrestrial c...

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  8. Epidermal cells secrete thick and waxy layer in cactus. Why?

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  9. Comment on the following statement. One of the characteristic featu...

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  10. Why are the surfaces of woody plants impermeable to water and gases?

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  11. Young stems (twigs) bend but do not break. Why?

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  12. Why are inte-rvertebral discs considered to be the strongest form of c...

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  13. Mention the type of adipose tissue found in infants. How does it diffe...

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  14. Why is spleen known as hematopoietic and haemolytic tissue?

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  15. Why do wrinkles appear on the skin with growing age?

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  16. Can a person survive if blood is completely drained out from the body?...

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  17. In old people knees make a bit crunching sound when they change their ...

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  18. Why does our skin shiver during winter?

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  19. There are 270 bones in the human body at the time of birth. Does this ...

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  20. Why do we sweat when we do physical exercise?

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