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Question
Which of the following statements is or are true?
(A) Uneven thickening of cell wall is characteristic of sclerenchyma.
(B) Periblem forms the cortex of the stem and the root.
(C) Tracheids are the chief water transporting elements in gymnosperms.
(D) Companion cell is devoid of nucleus at maturity.
(E) The commercial cork is obtained from Quercus suber.
Which of the following statements is or are true?
(A) Uneven thickening of cell wall is characteristic of sclerenchyma.
(B) Periblem forms the cortex of the stem and the root.
(C) Tracheids are the chief water transporting elements in gymnosperms.
(D) Companion cell is devoid of nucleus at maturity.
(E) The commercial cork is obtained from Quercus suber.
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Solution
The correct option is E B, C and E only
Companion cells are small, living cells found in the sieve tubes. These cells are rich in cytoplasm and are actively metabolic. The function is providing energy for transportation of food materials by active process.
Sclerenchyma fibres are dead cells, long with tapering ends, have a uniform thickening, leaving a narrow lumen. They are found below the epidermis, cortex, around vascular bundles.
Therefore, the correct answer is option E.
Companion cells are small, living cells found in the sieve tubes. These cells are rich in cytoplasm and are actively metabolic. The function is providing energy for transportation of food materials by active process.
Sclerenchyma fibres are dead cells, long with tapering ends, have a uniform thickening, leaving a narrow lumen. They are found below the epidermis, cortex, around vascular bundles.
Therefore, the correct answer is option E.
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