By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments.
The answer would be Activational <span />
Here are the correct sequenced items...
- largest class - <u> carbonates </u>
- found in caves - <u> sulfides </u>
- contain oxygen - <u> oxides </u>
- contain sulfur - <u> silicates </u>
Answer:
B. Ethanol
Explanation:
During absence of O2 pyruvic acid is reduced to ethanol in alcoholic fermentation.