Which stable element is used to determine the age of volcano rock
​

Chicken pox and hepatitis are bacterial diseases. true or false?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Which enzymes break down carbohydrates?