Q.

Which among the following statements are true?

A. Innermost layer of dicot root cortex has casparian strips.

B. Innermost layer of dicot stem cortex is rich in starch grains.

C. Monocot stem has several scattered vascular bundles of different sizes.

D. Vascular bundles of monocot or grass leaf are almost of same size except the bundles of main veins.

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a

A, B, C and D 

b

Only A and B

c

Only B, C and D

d

Only C and D

answer is A.

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Detailed Solution

Endodermis of dicot root and monocot root have casparian strips. Endodermis of dicot stem is called starch sheath. Monocot stem has several scattered vascular bundles with smaller ones at the periphery and larger ones at the center. Except that of main veins, the remaining vascular bundles of monocot leaf are almost of same size. 

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