Approximately 4.5 billion years ago
Answer:
Environmental, spatial and topographical factors.
Explanation:
Air temperature depends on many diverse environmental (vegetation) and geographical factors, being the most important one the altitude on the sea level since this factor can directly affect the amount of radiation received on the Earth's surface. Recently, many meteorological models capable of estimating air temperature under certain conditions have been developed. These computational models consider a multiplicity of factors and use input data that are associated with the topography and the location (e.g., longitude, latitude and altitude).
The best model there is for the carbon cycle
Most adult placental mammals have no remaining trace of the cloaca. Being placental animals, humans only have an embryonic cloaca, which is split up into separate tracts during the development of the urinary and reproductive organs.
