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Question

Dumb-bell shaped guard cells are found in


A
Gymnosperms
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B
Most dicots
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C
Cereals
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D
Xerophytes
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Solution

The correct option is B Cereals
The stomatal pores are regulated by guard cells. In most of the plants, guard cells are kidney bean shaped with the concavity of bean shape guarding the stomatal pore. In members of family Poaceae, Cyperaceae and many palms the guard cells are dumb-bell shaped. 
Thus, the correct answer is option C.

Biology

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