In searching for life in the solar system, which basic requirement of life is the most fundamental and the one we always look for?
A) the presence of organic matter
B) the presence of an energy source
C) the presence of liquid water
D) the presence of oxygen

Question

Quizplus · Accepted Answer

Liquid water is considered the most fundamental requirement for life because all known life on Earth is based on the chemistry of water. Water is essential for the chemical reactions of metabolism, transport of nutrients and waste, and maintenance of cell structure. While the presence of organic matter, an energy source, and oxygen are important factors for supporting life, they are not necessarily required for the emergence of life itself. Therefore, the presence of liquid water is considered the best indicator for the potential habitability of a planet or moon in our solar system.

In Searching for Life in the Solar System, Which Basic