First slide
The Tissue System
Question

Bulliform cells are also known as
A. Cork cells    
B. Expansion cells    
C. Motor cells    
D. Silica cells

Moderate
Solution

Since bulliform cells help in the expansion of lamina during the development of leaf these are called as expansion cells. The help in hygroscopic rolling and unrolling of lamina and given the name motor cells. They do not have suberin and may have little deposition of silica.

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