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Translocation

Companion cel...

Question

Companion cells in phloem are found in______

A

Angiosperms only

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B

Angiosperms and pteridophytes

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C

Angiosperms , pteridophytes and gymnosperms

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D

Angiosperm and gymnosperms

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Solution

The correct option is A Angiosperms only
Companion cells are large elongated cells of phloem with large nucleus. It is attached to the lateral side of sieve tubes. These cells help in transport of food along with sieve. These are specifically found only in angiosperms.

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Q. Phloem of angiosperm is different from that of pteridophytes and gymnosperms in

Q. Read the following statements and select the correct ones.
(i). Phloem parenchyma is absent in most monocots
(ii). Gymnosperms lack tracheids and vessels
(iii). Gymnosperms lack companion cells

Q. In pteridophyta and gymnosperms, which cells are present in place of companion cell?

Q. Consider the following statements
(a) Xylem transports water and minerals
(b) Gymnosperms lack sieve tubes and companion cells in phloem
(c) First formed primary xylem is called metaxylem
(d) Phloem fibres (bast fibres) are made of collenchyma
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Q. Assertion :In gymnosperms, plants show well developed vessels and fibres Reason: Companion cells are absent in gymnosperm.

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