Which statement describes the cells in a many-celled organism

answer: many celled organism never work alone. prokaryotic cells have no membrane-bound structures in the cell while eukaryotic cells do.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.