Facts and information about space and planets

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Evolution acts upon the population of organisms and not on each individual organism

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?