A) Large vacuoles
B) Secondary walls
C) Chloroplast with PEP-carboxylase enzyme
D) Absence of mitochondria
Correct Answer: C
Solution :
The guard cells are special kind of epidermal cells in terrestrial plants as have chloroplast (But only in dicots, in monocots either chloropost absent or rudimentry or functionally inactive) and have activity of PEP carboxylose enzyme. Rest of epidermal cells lack chloroplast. In hydrophytes all the epidermal cells of leaves have chloroplast.
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