Which characteristic is shared by all living things

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

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Vessels draining the myocardium of the heart, open primarily ,into which chamber?