Which two processes are responsible for keeping the percentage of atmospheric oxygen at relatively constant levels

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

Twind is considered to be an abiotic factor because it.?

Toorale man murder mystery < - your lab link 1. how was the toorale man found? 2. what did archaeologists learn about the burial? why is the burial important? 3. what information were the scientists able to learn from the skeleton itself? 4. why is the question of whether the injuries came from a stone or steel weapon important? how could scientists distinguish between the different types of weapons? 5. what did the carbon dating and soil testing tell scientists about toorale man? why are the dates interesting for scientists?