O Now: Do you think other populations of organisms (besides bacteria) become resistant to environmental conditions over time? Vhy or why not? (1-2 sentence response)

What is thought to have caused the mass extinction at the end of the cretaceous period?

The term equestrian relates to which animal? bulls cows horses pigs

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