A mule is born when a horse and a donkey mate successfully. Mules are sterile, meaning that they cannot reproduce, but they are still considered
alive. Explain how this can be true.

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples

Part a - which gene to compare? in this exercise, you will use the cytochrome c oxidase i (coi) gene to investigate relationships among salmon species. (this gene encodes a protein that functions in the mitochondrial electron transport chain.) you will compare the coi gene sequences from your salmon test samples to the standard sequences for each salmon species. in order for the coi gene to be useful for distinguishing among the different salmon species, which three statements must be true?