If you were testing how well different automatic car washes cleaned cars, the control group would be: This is an earth science question.

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)