A 900N mountain climber scales a 100m cliff. How much work is done by the mountain climber?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

What causes darkening of the skin as melanin production increases

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