Ascientist repeats another scientist's experiment but guts different results. what are possible causes

What does it mean for a cell membrane to be selectively permable

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 .

According to this food web which of the following would be considered primary consumers