In what forms do we find most of the water that is present on mars?

a.) in ice caps and as underground permafrost
b.) as flowing water on the surface of the planet
c.) in the atmosphere and flowing along canyons
d.) in great bodies of water such as lakes and rivers

A) in ice caps and underground permafrost

Explanation:

I just took a lesson on this and the fact said the Martian water is evaporated into space, in ice caps, and frozen underground. But the question said present on mars so its the last 2: Ice caps and frozen underground.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.