The homo erectus is the most common ancestor with modern humans
Changes in the gene pool are closely related to genetic mutations, which are a major part of evolution.
Answer:
Most plants appear green because they absorb all other colors of light and reflect back green into our eyes. Since chlorophyll molecules use the red (opposite of green) end of the visible light spectrum to complete photosynthesis, then red is most heavily absorbed.
Barometers are used to measure air pressure.
