The role of environmental factors on gene expression is illustrated by

The role of environmental factors on gene
  expression is illustrated by
  a. the varying plant height of genetically
  identical yarrow plants when grown at
  different elevations.
  b. the flower color of hydrangeas grown in
  soils of differing pH.
  c. the depression response that some persons
  make to very stressful situations.
  d. the fur pattern of Himalayan rabbits.
  e. all of these.

Question 2

Which of the following is NOT a known effect
  in the expression of Marfan syndrome?
  a. lanky, loose jointed skeleton
  b. weakened blood vessels
  c. calcium deposits in aorta
  d. excessive absorption of oxygen causing the
  blood cells to swell
  e. skin becomes inelastic