Answer:A checkpoint is a stage in the eukaryotic cell cycle at which the cell examines internal and external cues and "decides" whether or not to move forward with division.
Explanation: Easy Peasy
It is 24,901 mi. p.s u can also look it up on Google
it cause global warming which heats up the atmosphere and most animals in colder areas there homes are melting because of fossil fuels?
The ocean absorbs more co2
