Which of the following plays the major role in providing support to young herbaceous parts of the plant?
Correct answer: D. All of these
- A. Living cells of epidermis with higher turgor pressure.
- B. Living cells of cortex and pith with higher turgor pressure.
- C. Collenchyma cells
- D. All of these
Explanation
Young herbaceous organs receive support from turgid living cells in the epidermis, cortex and pith, while collenchyma provides additional flexible mechanical support. Since all listed tissues contribute, option d is correct; choosing only collenchyma overlooks the important role of cell turgor.
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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