An actin gene in humans is 92% identical to the homologous actin gene in mice. An actin gene in humans is 80\% identical to the homologous gene in yeast . What does this say about how long ago these organisms had a common ancestor ?

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

Which step is not included in the step approach to calculating the greatest common divisor?

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.