Choose all the answers that apply. The cell membrane . does not exist in plant cells
is made of phospholipids
is a single layer
is embedded with proteins
controls the transfer of materials into and out of the cell

- is made of phospholipids
- controls the transfers of materials in and out of the cell
- embedded with proteins

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.