Although there is no current evidence of life on Mars, it is thought that extremophile prokaryotes may be able to survive the harsh conditions of the planet. Mars is much colder than Earth and has very little liquid water. However, areas of salty water may allow for water to remain in a liquid form. Required:
Based on these conditions, which types of extremophiles are most likely to be found on Mars?

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos