How many of the followings constitute the bark?
( secondary phloem, secondary cortex, cork cambium, complimentary cells, epidermis, periderm )
(A)6
(B)5
(C)4
(D)3
Difficulty Level:
Which of the following is true for complementary cells?
(A)thin walled and colorless
(B)parenchymatous and rounded
(C)non- suberised
(D)All of the above
Difficulty Level:
Complimentary cells are formed by the activity of
(A)phellogen
(B)phellem
(C)phelloderm
(D) All of these
Difficulty Level:
Which of the following is true for lenticels
(A)lens shaped opening
(B) occur in most woody trees
(C)permit exchange of gases
(D)All of the above
Difficulty Level:
The function of lenticels are
(A)exchange of gases
(B)helps in transpiration
(C)helps in vegetative reproduction
(D)Both a and b
Difficulty Level:
If bark is removed then plants becomes_________ due to excess of water________
(A)thick, gain
(B)thin, loss
(C)dead, loss
(D)strong, intake
Difficulty Level:
In dicot root the complete ring of vascular bundle is formed by
(A)conjunctive tissue
(B)pericycle
(C)Endodermis
(D)Both A and B
Difficulty Level:
In dicot root vascular cambium is _________in origin.
(A)Primary
(B)Secondary
(C)Both A and B
(D)neither primary nor secondary
Difficulty Level:
The shape of the vascular bundle is __________in the beginning and later it becomes ___________in dicot root.
(A)wavy, circular
(B)circular, wavy
(C)circular , rectangular
(D)wavy, and trapezoid
Difficulty Level:
In dicot roots, secondary phloem is formed towards the _________ and secondary xylem is formed towards the __________ by the activity of vascular cambium.
(A)periphery, centre
(B)centre, periphery
(C)innerside, outerside
(D)Both B and C
Difficulty Level:
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