Dna strands are held together by separated dna copies itself

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?