Among the followings which is the most longest supportive cell?
Correct answer: A. Tracheids
- A. Tracheids
- B. Sclereids
- C. Trachea
- D. Collenchyma cells
Explanation
Tracheids are long, narrow, lignified cells that provide both support and water conduction, and they are generally more elongated than sclereids or collenchyma cells. Option c, trachea, is a likely choice because it sounds similar to tracheids, but trachea is not the correct name for an individual plant support cell.
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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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