What is a model? Spelling and punctuation count

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

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 .