The structure of the spinal cord can be described as(1) composed of thirty-one segments(2) having a cervical enlargement, lumbar enlargement, and two deep longitudinal grooves(3) a central core of gray matter that is surrounded by white matter(4) having gray matter that is composed of myelinated nerve fibers

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms