61.  In maize stem the vascular bundles are -

A. Arranged in a ring

B. Scattered-irregularly

C. Arranged in two ring

D. Scattered but smaller towards periphery

Answer : Option D

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62.  In T.S. the tracheid appears-

A. Square

B. Round

C. Polygonal

D. Oval

Answer : Option B

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63.  In T.S. the trachaea appears-

A. Isodiametric

B. Pentagonal

C. Circular

D. Hexagonal

Answer : Option A

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64.  In trachaea the end walls are

A. Continuous

B. Thick

C. Discontinuous

D. Absent

Answer : Option C

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65.  Compared to the diametre of metaxylem the diametre of protoxylem is -

A. Larger

B. Smaller

C. Broader

D. Angular

Answer : Option D

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66.   The ends of tracheids are

A. Projected

B. Flat

C. Perforated

D. Wall less

Answer : Option C

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67.  What is the normal appereance of stone cells ?

A. Hexagonal

B. Round

C. Isodiamatric

D. Oval

Answer : Option D

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68.  Stem has always-

A. Exarch xylem

B. Scattered V.B.

C. Arranged V.B.

D. Endarch xylem

Answer : Option C

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69.  Root has always

A. Endarch xylem

B. Tetrach stele

C. Exarch xylem

D. Palyarch stele.

Answer : Option C

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70.  Growth rings are produced due to activity of -

A. Extrastealar cambium

B. Interstealar cambium

C. Intrastealar cambuim

D. B & C both

Answer : Option C

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