- It was a weakly reducing atmosphere
- It was hotter
Explanation:
The primordial earth’s atmosphere was mainly composed of carbon dioxide and methane. These are greenhouse gases that kept the temperatures of the atmosphere high because they trap infrared radiation that reflects off the earth's surface. These gases also made the atmosphere a reducing atmosphere due to the absence of oxygen. The most likely source of carbon dioxide was frequent volcanoes at the time and the methane from early anaerobic microbes.
The atmosphere changed when photosynthetic organisms evolved and caused the Great Oxygenation Event because they evolved oxygen.
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For more on Great Oxygenation Event;
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It is C, <span>Matter and energy are conserved as they pass through a food web.</span>
Answer:
Lobe-finned fish are thought to be the close relatives to tetrapods because of the fact that the fins are very flexible and potentially useful for supporting the body on land, as in lungfish and tetrapods.
Explanation:
Lactic acid buildup is a harmless response to strenuous exercise and will go away on its own. Once the body has used the resulting lactate for energy, the liver breaks down any excess in the blood.
