Why are hydrocarbons not soluble in water

Which of the following would most likely be key to gathering evidence that the rna world hypothesis is valid? creation of suitable environments for long-term study of single-celled organisms simulation of early earth conditions and long-term study of the resulting molecules development of a system for studying the microsphere's ability to absorb additional molecules categorization of the different specific conditions that result in the development of microspheres

Acommon kind of mechanical weathering is called

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity