For a cubic crystal, which of the following planes would have the LARGEST diffraction angle when characterized using x-ray diffraction?

Which of the following statements is generally true about the mass densities of STYROFOAM  and PLEXIGLASS:

True/False: Because of their rigid bonding angles, covalent solids usually have more open crystal structures than ionic solids.

Which of these images shows the direction in a unit cell?

The notation for a body-centered lattice is:

31. Human gametes contain? 

39. MenAlien Grey skin and 4 fingers are recessively inherited traits to green skin and 3 fingers on the Planet Reticulin. If a Reticulin Alien is heterozygous for both of these traits which of the following gametes can it produce?  (use the letters G(g) and F(f) to denote these alleles and remember to FOIL!)

56. In which of the following types of cells would you expect to see a barr-body as a result of X-inactivation? 

21. Recall that MPF (Mitosis Promoting Factor) is a complex of M cyclin: M Cdk.  Based on this, which timepoint below would represent M phase of the cell cycle?

7. Which of the following could you NOT determine from looking at a Karyotype?