How does soil form on an island that is made of cooled rock from a volcanic eruption?

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

What advantages does a pedigree have over a written passage?

What tool do geneticists use to predict the outcome of genetic crosses? a.karyotype b.punnett square c.centrifuge