What has led to the rapid analysis of DNA? Where do scientists now hope to apply these tools?

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

How do cells grow and reproduce to maintain homeostasis?

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