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What is true of every vascular bundle in a leaf, however large or small?
AIt carries phloem but no xylem tissue
BIt contains both xylem and phloem tissues
CIt carries xylem but no phloem tissue
DIt contains only ground tissue and pith
Answer & Solution
Correct answer: B. It contains both xylem and phloem tissues
1. Leaf veins are vascular bundles, built like those of the stem.
2. The xylem in them carries water and minerals into the leaf.
3. The phloem carries photosynthetic products out of the leaf to the rest of the plant.
4. A single vascular bundle always contains both tissues, whatever its size, so neither can be missing.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.4 Leaves_
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