How do littoral zones differ from riparian zones?

The littoral zone is submerged whereas the riparian zone is generally not submerged (other than cases of flooding). However, differences between the two terms depend on who is defining the terms and how they are being used. The littoral zone is the area close to the shore of a river, lake, or the ocean.

Explanation:

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b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.