The nursing student asks the instructor why it is more difficult to develop antiviral drugs than anti-infectives. the nursing instructor's best reply would be which?

This is because viruses, which are dealt by with antiviral drugs,are tiny and replicate very first changing how a cell works

The answer your looking for is a food chain grid. it describes how nature can support itself and survival of the fittest comes into play..

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.