The air spaces may comprise upto _________ of total volume of leaf surface?
A. 30%
B. 20%
C. 40%
D. 50%
The air spaces may comprise upto _________ of total volume of leaf surface?
The air spaces may comprise upto _________ of total volume of leaf surface?
A. 30%
B. 20%
C. 40%
D. 50%