<span>Ferns and reptiles appeared in the paleozoic era.</span>
Answer: A
Explanation: Calculate the molar hydrogen ion concentration of each of the following biological solutions given the pH, Urine pH= 4.90
Answer:
The material moved by erosion is sediment. The agents of erosion lay down sediment in a process called deposition. Deposition builds new landforms. Weathering, erosion, and deposition act together in a cycle that wears down and builds up Earth's surface.
Explanation:
