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(B) The phloem of angiosperms is composed of sieve tube elements,companion cells,phloem parenchyma,and phloem fibers. Sieve tubes and companion cells

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Angiosperms

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(B) The phloem of angiosperms is composed of sieve tube elements,companion cells,phloem parenchyma,and phloem fibers. Sieve tubes and companion cells are specialized cells found exclusively in the phloem of angiosperms. Gymnosperms lack true sieve tubes and companion cells; instead,they possess sieve cells and albuminous cells. Therefore,the presence of sieve tubes and companion cells is a characteristic feature of angiosperms.

Sieve tubes and companion cells are a characteristic feature of ........

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