Carbon is cycled back to the carbon dioxide pool by
a. cellular respiration, erosion, and combustion
b. assimilation, photosynthesis, and respiration
c. decomposition, erosion, and assimilation
d. combustion, photosynthesis, and decomposition

How does human environment effect the biosphere

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 does the positioning of transcription factors determine?