Answer:
1] Water is the molecule of life because it can exist in three different states: Liquid, Ice, Gas. We know that Ice molecules are:
(a) closer together than liquid molecules
2] Prokaryotes that live in extreme conditions such as hypersaline, thermal vents and the arctic.
(d) Archaea
3] What does adaptation mean in a biological context?
(a) the way in which an individual changes in relation to its environment.
4] The reaction of KCI + H2O -> K+ + CL- is ________________.
(c) Polar