Gel electrophoresis is often used to study evolutionary relationships of species the diagram below shows the results of gel electrophoresis for four different animals A, B,C and D

Which species has the most DNA in common with species A ?

a. B

b. C

c. D

Average annual precipitation and are the two major features that define the biomes on earth.

Which of the following represents the correct format for the scientific name? a. staphylococcus aureusb. staphylococcus aureusc. staphylococcus aureusd. staphylococcus aureus

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass