Which body system is most like the cell wall?

Which flexible structure that supports the nerve cord and led to the backbone

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

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?