Image citation:
Hillis, D.M., D. Sadava, H.C. Heller, and M.V. Price. 2012. Principles of Life, High School Edition. p. 505. Sinauer Associates, Inc. Sunderland, MA.
Hillis, D.M., D. Sadava, H.C. Heller, and M.V. Price. 2012. Principles of Life, High School Edition. p. 505. Sinauer Associates, Inc. Sunderland, MA.