800,000 to 1.5 million nephrons on average per kidney
they are prokaryotic and they are tolerant to extreme environments.
Explanation:
Index fossils are fossils type fossils that are used to identify stratigraphic records and their positions. They are vey key in determining relative ages of rock sequences.
- These fossils have a short vertical stratigraphic range.
- Index fossils have short evolutionary history.
- They are widely distributed in nature.
- Examples of index fossils are trilobites and ammonites.
The answer i chose is A the tilt of the Earths axis
Above 7 is basic. Below 7 is acidic
