List and describe the major characteristics of life.

What is the correct orderin the hierarchal levels of organization of life, from smallest to largest?   cells, tissues, organs, organisms, and populations   cells, tissues, organs, organisms, and ecosystems   molecules, cells, organs, tissues, and organisms   atoms, tissues, cells, organs, and organisms   ecosystems, populations, tissues, cells, and organs

Which of the following represents the correct sequence of levels in life's hierarchy, proceeding downward from an individual animal? Obrain, spinal cord, organ system, nerve cell, nervous tissue; O organ system, population of cells, nervous tissue; Oorganism, cardiovascular system, heart, cardiac tissue, myocardial cell; O organism, intestinal cells, digestive system, pancreas;

List the three domains of living things and briefly define each.