Which evidence supports the argument that life may have come from outside Earth?
A) Reorientation studies indicate that long interplanetary trips by living organisms is possible.
B) Macromolecules unique to life have been found in meteorites.
C) Polycyclic aromatic hydrocarbons have been found in meteorites.
D) Magnetite, an iron oxide mineral made by many living organisms on Earth has been found in meteorites.
E) All of the above

Question

Quizplus · Accepted Answer

All of the options provide evidence that supports the argument that life may have come from outside Earth. Reorientation studies suggest that long interplanetary trips by living organisms are possible, while macromolecules and polycyclic aromatic hydrocarbons unique to life have been found in meteorites. Additionally, magnetite, an iron oxide mineral made by many living organisms on Earth, has also been discovered in meteorites. Combining these pieces of evidence increases the likelihood that life originated elsewhere and then spread to Earth.

Which Evidence Supports the Argument That Life May Have Come