If you found absorption rising from _________ in the spectrum of a planet, you could conclude that it might contain some form of life.
A) oxygen
B) methane
C) water vapor
D) oxygen, methane, or water vapor

Question

Quizplus · Accepted Answer

Oxygen, methane, and water vapor are all molecules that can be produced by biological processes, such as photosynthesis and respiration. Therefore, if any of these molecules were detected in the spectrum of a planet's atmosphere, it could indicate the presence of some form of life.

If You Found Absorption Rising from _________ in the Spectrum