The first organisms to appear on earth did not need?
a.
oxygen.
c.
cells.
b.
nitrogen.
d.
chemicals.

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

Which would be the most useful source of evidence to support mcneill's contention?