Molecules that control the stages of the cell cycle in all eukaryotes are similar.

Eukaryotes share a common ancestry

Explanation:

molecules that control the stages of the cell cycle in all eukaryotes are similar.

The hypothetical micro life in mars must have 4 principal characteristics: anaerobiosis, desiccant resistant, psychrophilic and radiotolerence.

Explanation:

Mars has a very extreme environmental condition. The atmosphere of mars has about 95% of carbon dioxide and very low oxygen ( 0.18%),  minor amounts of water and the average temperature is about minus 80 degrees. Also, it has elevated radiation of its surface. The micro life must grow in the absence of oxygen ( called anaerobiosis), the ability to grow at very low temperatures ( called psychrophilic) and must be desiccant and radiotelorant to be able to survive.