In grasses leaves are exposed when bulliform cells becomes­­­­_________ and leaves curl inwards when they are _________

(A)flaccid ,turgid

(B)plasmolysed, turgid

(C)turgid, flaccid

(D)Both B and A

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In onion and garlic, the leaves are

(A)cylindrical

(B)bifacial

(C) unifacial

(D) Both A and C

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Dicot leaves are ____________and monocot leaves are _______________.

(A)hypostomatic and amphistomatic

(B)amphistomatic and hypostomatic

(C) Astomatic and amphistomatic

(D) epistomatic and hypostomatic

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Secondary growth is because of

(A)vascular cambium

(B)cork cambium

(C)lateral meristem

(D)All of the above

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Secondary growth  is present in

(A)stelar region

(B)extra stelar region

(C)Both A and B

(D)None of these

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Interfascicular cambium is formed from

(A)medullary rays

(B)intrafascicular cambium

(C)cork cambium

(D)pericycle

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Vascular cambium includes

(A)only intrafascicular cambium

(B)only interfascicular cambium

(C)Both intrafascicular and interfascicular cambium

(D)cork cambium

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The cells which are formed from vascular cambium towards the centre are____________and towards the periphery are _________________

(A)secondary xylem, secondary phloem

(B)bast, wood

(C)wood, bast

(D)Both A and C

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The secondary xylem is produced more because

(A)cambium is more active towards the inner side

(B)cambium is more active towards the outer side

(C)xylem is more important than phloem

(D)All of the above

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The primary and secondary phloems get gradually crushed because of

(A) continuous formation and accumulation of  secondary xylem

(B)discontinuous formation and accumulation of secondary xylem

(C)by pressure of secondary xylem as they are continuously formed   

(D)Both A and C    

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Difficulty Level: