Answer:
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory.
Explanation:
Pluto is not considered a planet due to all the reasons you stated above
These processes are volcanic eruptions, impact cratering, tectonics, and erosion. Impact cratering may occur due to meteoroids. The eruptions and disruptions caused during these processes lead to the release of many minerals and other components which eventually affect the surface geology of a planet.
The cause behind these changes is the that the temperature is changing while it is raining, so when it drops to 32 degrees F or below, it is snow. At 32 degrees F, it is sleet, and at higher than 32 degrees, it is going to be freezing rain.
