Biology · Gaseous Exchange
Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.
The guard cell of the stomata in Monocot is:
- A
Kidney shape
- B
Oval
- C
Rounded
- D
Dumbbell shaped
The correct answer is dumbbell-shaped. Monocots have stomatal guard cells that are dumbbell-shaped, allowing for better regulation of gas exchange. This shape is better suited for monocots, which often grow in environments where water conservation is critical. In contrast, dicots usually have kidney-shaped guard cells, which are adapted to their specific environmental conditions. The other options, such as kidney, oval, and rounded shapes, do not accurately represent the typical guard cell shape found in monocots.
Kidney-shaped guard cells are typical of dicots, not monocots. This shape is adapted to their different environmental needs.
Oval guard cells are more commonly found in some dicots. Monocots typically have a different shape.
Rounded guard cells are less common and do not typically characterize monocots.
The guard cells of the stomata in monocots are dumbbell-shaped. This unique shape allows them to efficiently control the size of the stomatal aperture, which is crucial for water conservation in hot and dry environments.
Tagged under Biology · Gaseous Exchange · 2016