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Heart wood is durable and resistant to m...

Heart wood is durable and resistant to microbial attacks due to the deposition of

A

Tannins, resins and gums

B

Mineral crystals and oils

C

Starches, proteins and fats

D

Enzymes, hormones, acids

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The correct Answer is:
A
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AAKASH SERIES-HISTOLOGY AND ANATOMY OF FLOWERING PLANTS-EXERCISE - I (SECONDARY GROWTH)
  1. A tree grows at a rate of 0.5 m/yr . What will be the height of a boa...

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  2. A hundred year old tree of temperate area will show

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  3. In some old trees, though the central part (heart wood) is lost, the p...

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  4. A hundred year old tree of temperate area will show

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  5. In a cut trunk of a tree the section was showing 26 concentric rings o...

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  6. Highly durable and commercial valuable wood of the following is

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  7. Heart wood is durable and resistant to microbial attacks due to the de...

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  8. Select mismatch from the following

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  9. All of the following are component of bark except.

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  10. The secondary cambium develops partly from pericycle and partly form c...

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  11. Secondary growth commonly occurs in

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  12. The main role of vascular rays is

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  13. The xylem vessels are relatively more in number in

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  14. Vascular cabium produces

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  15. Bark formed early in the season is called as

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  16. Complementary cells are formed by the activity of

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  17. The youngest layer of secondary phloem in woody dicot stem is located

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  18. Which of the following is not related to vascular cambium

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  19. Spring wood and Autumn wood are found in

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  20. Spring wood and Autumn wood are found in

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