Answer:
The answer is autotrophs
Explanation:
During the early days of the Earths life there was no oxygen but there was plenty of CO2 which the autotrophs took and used as food while discarding the excess which was the oxygen.
Answer:
atomic number or atomic mass
The Kupffer cells protect the liver from bacterial infections
The FireWiire is connection used for camcorders, DVD players, and gaming consoles. The standard that defines the FireWire connection is <span>IEEE 1394. IT is an interface standard for a serial bus for high-speed communications and isochronous real-time data transfer. </span>
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