In Dicots, secondary xylem and phloem tissues are formed because of

(A)open vascular bundle

(B) closed vascular bundle

(C) Both A and B

(D) semi closed vascular bundle

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Radial vascular bundle arrangement is most common in

(A)roots

(B) stem, and roots

(C) leaves

(D) All of the above

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In radial vascular bundle xylem and phloem are present on _____________radii and in an ___________manner.

(A)different and consecutive

(B) same and alternate

(C) different and alternate

(D) same and consecutive

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In conjoint type vascular bundle xylem and phloem are present on _________ radii and & phloem is located on the __________side of the xylem.

(A)same and outer

(B) same and inner

(C) different and inner

(D) different and outer

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Conjoint vascular bundles are most common in

(A)root, stem, and leaves

(B) root and stem

(C) stem and leaves

(D) root and leaves

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Conjoint  closed vascular bundles are present in

(A)root, stem, and leaves of monocots

(B) root, stem, and leaves of dicots

(C) stem and leaves of monocots

(D) stem and leaves of dicots

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Conjoint open vascular bundles are present in

(A) stem of dicots only

(B) stem of dicots and gymnosperms

(C) stem of monocots and gymnosperms

(D) stem of monocots only

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In conjoint bicollateral and open vascular bundle there are _____________strips of cambium in which ___________is functional.

(A)two,inner

(B) two, outer

(C) one, inner

(D) one, outer

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The outermost layer of the root is

(A)epidermis

(B) endodermis

(C) hypodermis

(D) dermis

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Root hairs arise from__________

(A)epidermis

(B) endodermis

(C) pericycle

(D) cortex

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