<span>During the twentieth century, absolute date was added to the relative time scale. </span>Geologic time scale uses both relative and absolute dating techniques. <span>Soon after the discovery of radioactivity, geologists used radioactive isotope decay to develop a method for determining absolute ages of rocks</span>
There always has to be a dominant allele
Answer:
Metaphase
Explanation:
Metaphase is when the sister chromatids line up in the middle with fibers attached to each end.
