In 3 to 5 sentences identify the type of bonding the would form between potassium and chlorine use a to justify the bond type provide a chemical formula for resulting compound

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

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