In a food web, arrows poinet in just one direction beacsue the show what?

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

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 organs comprise the respiratory system of a bird