What are chemicals that allow electric current to pass through our bodies that are important for nerve and cell function called?

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

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

How does secondary succession differ from primary succession?