Do subs require soil contact for survival?

Subs, or submergent aquatic plants, typically do require soil contact for survival in their natural habitat. These plants grow in submerged conditions in water bodies but rely on their roots being anchored in the sediment or soil at the bottom. The soil provides necessary nutrients and stability, allowing the plants to thrive in their aquatic ecosystems.

It is important to note that while some aquatic plants can survive in shallow water without complete soil contact, the majority of them, especially submergent varieties, depend on being anchored to the substrate. This anchoring helps them to not only maintain their position in the environment but also to effectively uptake water and nutrients through their roots.

Therefore, the statement that subs require soil contact for survival is accurate, reflecting the ecological relationship these plants have with their substrate in order to flourish.