Small bodies like asteroids and comets are unlikely to harbor life because they
A) are constantly colliding with each other, sterilizing any life that may be present
B) have not had liquid water inside them for extended periods now or in the past
C) do not contain any organic molecules
D) are so far from the Sun that any water would be permanently frozen

Question

Quizplus · Accepted Answer

While the other options may pose challenges to the existence of life, the lack of liquid water for extended periods of time is the biggest hurdle for life to exist on small bodies like asteroids and comets. Water is essential for life as we know it, and without it, the chances of life emerging or surviving are very low.

Small Bodies Like Asteroids and Comets Are Unlikely to Harbor