Which of these does Mars NOT have to help its case of past or present life?
A)occasional water flows, and past records of much larger ones
B)a protective ozone layer
C)carbon dioxide to provide some greenhouse warming
D)a favorable distance from the Sun
E)rover discoveries of sedimentary rocks and carbonates on the surface of Mars

Question

Quizplus · Accepted Answer

Mars does not have a protective ozone layer, which is a crucial component for protecting life on Earth from harmful UV radiation. Mars does not have a protective ozone layer, which could make it more difficult for life to survive on the planet due to increased exposure to harmful radiation. However, the other options listed all support the possibility of past or present life on Mars.

Which of These Does Mars NOT Have to Help Its