How are the carbon, oxygen, and nitrogen cycles vital to sustaining life on earth?
a.
carbon, oxygen, and nitrogen are vital components of life on earth.
b.
the carbon, oxygen, and nitrogen cycles allow vital elements to return to usable form by organisms.
c.
the carbon, oxygen, and nitrogen cycles are an important interface between biotic and abiotic factors.
d.
all of the above are reasons the carbon, oxygen, and nitrogen cycles are vital to life on earth

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

Which is the graph of the piecewise function f(x)? f(x) = image for option 1 image for option 2 image for option 3 image for option 4

Label the steps for protein synthesis in order, beginning with the first steponce the protein is made, the gene for a particular trait is expressedmrna joins the ribosome, and the anticodons from trna join mrna to form a chain ofamino acidsrna polymerase unzips dna and free rna nucleotides join dna to form mrnav a chain of amino acids is formed from peptide bonds, creating a proteinmrna is transported from the nucleus of the cell to the ribosomes of the cell.