Explain/Teach these Concepts to a Friend

1. Draw a three dimensional color space of the type that Maxwell devised: one axis represents the degree of activation of the S cones, a second axis represents the degree of activation of the M cones, and the third axis represents the degree of activation of the L cones.  What set of points in this three-dimensional space corresponds to each of the pure wavelengths along the spectrum?  What set of points corresponds to white light?  What set of points corresponds to the family of colors between saturated red and white (i.e. all of the shades of pink)
   
   
2. Explain how amino acid sequence similarities and differences can be used to construct “tree” diagrams of evolutionary relatedness (i.e. a diagram where the lengths of the branches represent the extent of sequence divergence, and the point where two branches join together represents the most recent common ancestral sequence).  Historical note: Charles Darwin drew the first “tree” diagram of species diversity, and Linus Pauling conceived of the idea that this approach could be applied to protein sequences.