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11th Tamil Nadu Board
IMPORTANT
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In spring season vascular cambium
i. is less active
ii. produces a large number of xylary elements
iii. forms vessels with wide cavities of these

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Important Questions on Secondary Growth

EASY
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 2
Usually, the monocotyledons do not increase their girth, because
HARD
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 3
 In the diagram of lenticel identify the parts marked as A, B, C, D.
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EASY
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 4
 The common bottle cork is a product of 
EASY
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 6
In a forest, if the bark of a tree is damaged by the horn of a deer, how will the plant overcome the damage?
EASY
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 7
In which season the vessels of angiosperms are larger, why?
EASY
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 8
A continuous state of dividing tissue is called meristem. In connection to this, what is the role of lateral meristem?
EASY
11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 9
A timber merchant bought 2 logs of wood from the forest and named them A and B, The log A was 50 years old and B was 20 years old. Which log of wood will last longer for the merchant? Why?
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11th Tamil Nadu Board
IMPORTANT
Biology Botany Standard 11>Chapter 10 - Secondary Growth>Evaluation>Q 10
A transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How are these rings formed? What are the significance of these rings?