Root structures that grow around and encapsulate mutualistic nitrogen-fixing bacteria are called ____.

Question

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Root structures that encapsulate mutualistic nitrogen-fixing bacteria are called root nodules. Choice A, hyphae, are fungal structures that form associations with plant roots. Choice B, mycorrhizae, are associations between plant roots and fungi that help with nutrient uptake. Choice C, the Casparian strip, is a structure in the root that helps regulate the flow of water and dissolved substances. Choice D, root hairs, are extensions of root cells that help with nutrient absorption.

Root Structures That Grow Around and Encapsulate Mutualistic Nitrogen-Fixing Bacteria