Botany - Secondary Growth Three Marks Questions

11th Standard

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Biology

Time : 00:45:00 Hrs
Total Marks : 30
    10 x 3 = 30
  1. A timber merchant bought 2 logs of wood from a forest & named them A & B, The log A was 50 year old & B was 20 years old. Which log of wood will last longer for the merchant? Why?

  2. A cross section of tree trunk contains 60 lighter and 60 darker rings. Determine the age of the tree and justify.

  3. What is amber?

  4. Write the differences between vascular cambium and cork cambium?

  5. How are barks classified?

  6. Mention two important products obtained from bark.

  7. What is Haematoxylin?

  8. Differentiate Phellem and Phelloderm.

  9. What is Gum Arabic?

  10. What is Turpentine?

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