How has seaweed adapted to get nutrients?

Seaweed has adapted to obtain nutrients primarily through direct absorption from seawater, utilizing specialized structures like rhizoids or holdfasts to anchor themselves while maximizing surface area for nutrient uptake. Unlike terrestrial plants, seaweeds lack roots and vascular systems, allowing them to efficiently absorb dissolved nutrients directly through their fronds. Additionally, many species exhibit adaptations such as high surface area-to-volume ratiOS and the ability to thrive in various light conditions, enhancing their photosynthetic efficiency and nutrient acquisition.