If different animals have the same bones, although some are shaped differently and placed in different positions, what would this suggest about these animals? (organisms having common features suggest? )

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?