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Why are the surfaces of woody plants imp...

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

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Surfaces of woody plants are impermeable to water and gases due to the presence of cork cells. These cells have a layer of suberin on their walls due to which surfaces are impermeable.
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PEARSON IIT JEE FOUNDATION-TISSUES -MASTERING THE CONCEPTS (APPLICATION AND ANALYSIS )
  1. Epidermal cells secrete thick and waxy layer in cactus. Why?

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

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

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

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

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

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

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

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

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

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  11. Why does our skin shiver during winter?

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

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

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  14. Clusters of egg cells are not considered as tissue. Give reason.

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  15. Epithelial tissue in animals is non-vascular but permeable. Give reaso...

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  16. Thin people feel colder than fat ones. Give reason.

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  17. Blood is known as fluid connective tissue. Give reason.

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  18. Cardiac muscles show rhythmic contractions. Why?

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  19. Mitochondria are abundant in neurons. Give reason.

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  20. Bones become more and more fragile in old age. Justify.

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