Which of the following is currently increasing because of human population growth and it’s associated impacts

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 of the following is a common response to cell signaling?

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12