Why do leaves have veins?
Show answer & explanation
Answer: Transport water and nutrients
They help produce chlorophyll — Wrong. Veins don't produce chlorophyll—chloroplasts in leaf cells do. Veins transport water and nutrients to support photosynthesis.
Transport water and nutrients ✓ — Correct! Leaf veins are vascular bundles containing xylem (brings water and minerals from roots) and phloem (distributes sugars made by photosynthesis). The branching network ensures every leaf cell gets water for photosynthesis and exports products. Vein patterns (parallel in monocots, netted in dicots) maximize efficiency!
Store excess sugar — Wrong. Veins don't store sugar—they transport it through phloem to other plant parts. Storage happens in specialized cells, not vascular tissue.