A medical test indicates that a patient has a defective protein. This
condition is most likely due to a change in the directions coded in the:

number of phosphate molecules
sequence of subunits in DNA
number of nitrogen bases
sequence of sugar molecules

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.