Which describes the principle of superposition? A) All the rock layers are the same age.
B) Older rock layers are at the bottom, and younger layers are at the top.
C) The rock layers alternate every other layer between younger and older.
D) Younger rock layers are at the bottom and older layers are at the top.

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

How can you approximate the number of calories required to keep you in energy balance?

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