When searching for life on another planet, the essential molecule(s) to look for as a sign of life as we know it is/are
A) nucleic acids.
B) water.
C) amino acids.
D) nitrogen.
E) carbon dioxide.

Question

Quizplus · Accepted Answer

Water is essential for all known forms of life on Earth, and thus, it is a critical molecule to look for when searching for life on other planets. Although other molecules, such as nucleic acids and amino acids, may be present in non-living environments, the presence of liquid water is the most reliable indicator of a habitable environment that could support life. Therefore, water is the best choice to look for as a sign of life as we know it.

When Searching for Life on Another Planet, the Essential Molecule(s)