In which sealed container would organisms be able to continuously cycle oxygen and carbon dioxide gases?
an aquarium with fish and plastic plants
a terrarium with a plant and a snail
an aquarium with rocks and a snail
a terrarium with tadpoles and a pool of water

The total number of nucleons

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic