alleryIn grasses, the guard cells are
ARound and never thickened anywhere
BTriangular with thick outer wall only
CBean-shaped as in other dicot leaves
DDumb-bell shaped with thick mid wall
Answer & Solution
Correct answer: D. Dumb-bell shaped with thick mid wall
Grass (monocot) guard cells are dumb-bell shaped.
Their walls are thick centrally; turgor changes open/close the pore.
Dicot guard cells are bean-shaped with thick inner walls.
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