Place the following stages of a small stars life cycle in the correct order from top to bottom? What is the order? Supernova(always)
Nebula
Main sequence
Protostar
Red giant
White dwarf

An enzyme lowers the energy of activation. what does that mean?

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .

The chemical form of energy that is useable by the cell to do work