The gases being released from the ground
Answer:
Air, water life without these is nothing
(B.) Sea levels rose over 300 feet
I think
Yes. You could do this by adding solvents to break down any cell walls, centrifuge to separate the DNA, if you haven't got much then upscale with PCR, gel electrophoresis could be used to detect the DNA, and Sanger sequencing to find the sequence.
That would be temperature. (:
Hope this helps!