Which of the following are true regarding ores? i. ores can be metallic. ii. ores can be nonmetallic. iii. ores consist of minerals. iv. materials removed from ores are useful.

What is the function of nucleic acids

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

What processes would you expect to be key in the production of yogurt ?