Which of the following statement is true ?

1. Vessels are unicellular and with narrow lumen

2. Vessels are multicellular and with wide lumen

3. Tracheids are unicellular and with wide lumen

4. Tracheids are multicellular and with narrow lumen

Please attempt this question first.

Difficulty Level:


Match the Column I and II.

Column I

Column II

A.  Bulliform cells

1.   Stomata

B.  Guard cells

2.   Aerating pore

C.  Lenticels

3.   Accessory cells

D.  Subsidiary cell

4.   Isobilateral cells


        A  B  C  D
(a)   1   2  3   4
(b)   3   1  2   4
(c)   4   1  2   3
(d)   4   3  2   1

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Difficulty Level:


Root cambium is derived from?

(a) primary meristem
(b) secondary meristem
(c) intercalary meristem
(d) apical meristem

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Difficulty Level:


Glycolate induces opening of stomata in

(a) Presence of oxygen

(b) Low CO2 concentration

(c) High CO2 concentration

(d) Absence of CO2

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Difficulty Level:


Two adjacent vessel and tracheid exchange sap through

A. Perforated end walls

B. Pits

C. Intercellular spaces

D. Intracellular spaces and parenchyma

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Difficulty Level:


Which one of the following comprises only simple tissue?

A. Parenchyma, Collenchyma and Sclerenchyma

B. Parenchyma, Xylem and Collenchyma

C. Parenchyma, Xylem and Sclerenchyma

D. Parenchyma, Xylem and Phloem

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Difficulty Level:


Match the following

A. Meristem i. Photosynthesis, storage

B. Parenchyma ii. mechanical support

C. Collenchyma iii. Actively dividing cells

D. Sclerenchyma iv. stomata

E. Epidermal tissue v. Sclereids

A. A-i, B-iii, C-v, D-ii, E-iv

B. A-iii, B-i, C-ii, D-v, E-iv

C. A-ii, B-iv, C-v, D-i, E-iii

D. A-v, B-iv, C-iii, D-ii, E-i

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Difficulty Level:


What is the destiny of primary xylem in a dicot root showing extensive secondary growth?

A. It is retained in the centre of the axis

B. It gets crushed

C. May or may not get crushed

D. It gets surrounded by primary phloem

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Difficulty Level:


Which one of the following cell types always give rise to secondary cortex?

A. fusiform initial cells

B, root cap

C. protoderm

D. Phellogen

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Difficulty Level:


A stem without vessel possessing prominent sieve tubes would belong to

A. Pinus

B. Eucalyptus

C. Grass

D. Trochodendron

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Difficulty Level: