Plz help me with this.

Depending on the organism the number of in a cell may change

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.

During photosynthesis, hydrogen ions are most directly used to in the chloroplast pictured above. a) make glucose b) make chlorophyll c) produce carbon dioxide d) drive the production of atp