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The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: