When we analyze whether a world is a possible home to life,the key thing we look for is
A)the past or present existence of liquid water.
B)evidence of atmospheric oxygen.
C)the presence of organic molecules such as amino acids.
D)surface coloration changes that could indicate vegetative growth.

Question

Quizplus · Accepted Answer

The most important factor in determining if a world is a possible home to life is the past or present existence of liquid water. Water is essential for life as we know it, so the presence of liquid water is a strong indicator that a planet may host life. The other options listed may also be important in certain contexts, but none are as universally important as the presence of liquid water.

When We Analyze Whether a World Is a Possible Home