MCQ
In a vertical section of a dorsiventral leaf, the protoxylem in its midrid bundle
- ✓Faces the dorsal epidermis of the leaf
- BFaces the ventral epidermis of the leaf
- CIs not distinct
- DIs surrounded by metaxylem
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$III.$ Enzyme catalyzing reaction that fixes $CO _{2}$ $IV.$ Presence of Calvin cycle
$V.$ Leaf anatomy
Which one does not differ in a $C_{3}$ and $C_{4}$-plants?