Which of following is absent in primary and secondary structure of stem of Pinus

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6.Anatomy of Flowering Plants

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Which of the following is absent in the primary and secondary structure of stem of Pinus

A

Sieve tubes

B

Mucilage duct

C

Companion cells

D

Phloem parenchyma

(AIIMS-2000)

Solution

(c) Companion cells are found in angiosperms only. In gymnospermic plants albuminous cells are found in place of companion cells.

Standard 11

Biology

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