Why does the dna rise to the top after adding the solution?

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

Plants that have reproductive structures called cones are?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back