Guard cells of stoma are ________ ?
Correct answer: D. Kidney-shaped
- A. Irregular in shape
- B. Convex in shape
- C. Long and cylindrical in shape
- D. Kidney-shaped
Explanation
In most dicot plants, guard cells are kidney-shaped and change their turgor to open or close the stomatal pore. Students may choose long and cylindrical because grass guard cells have a dumbbell-like form, but that is not the usual shape in most plants.
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About Animal and Plant Cell
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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