These air pockets allow the blades to float near the water's surface to capture the sunlight needed for photosynthesis. They do not have true stems, roots, or leaves. Arthropods include insects, spiders, crabs, and lobsters.
Bacteria are among the smallest, simplest, and oldest types of cells.
This zone is exposed to air for about half of the day. Barrier beaches are different from barrier islands in that one or both ends of the beach is connected to the mainland. This is where the land meets the water. Waves break on this part of the beach. A berm is caused by waves depositing sediments during high or storm tides.