What determines whether or not a body system is likely to remain in a phylum over the course of evolution

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 .

What does natural resource management aim at ?

What best describes the dropping height of a ball that bounces back up to a height of 45 cm