TED talk reaction paragraph

After watching the linked TED talk, address the following in a short paragraph...

1. What is quorum sensing/ what is going on /how does it work? explain in words or use example.
2. Why are scientists studying how bacteria (and not just human cells) communicate?
3. According to Bonnie Bassler (Princeton University), what are scientists hoping to use as the next class of antibiotics? Why?
4. Explain what you thought was most interesting or significant and why.