In his experiments with pea plants, Mendel removed which part of the plant to prevent unwanted ...

In his experiments with pea plants, Mendel removed
  which part of the plant to prevent unwanted
  fertilizations?
  a. flowers
  b. petals
  c. pistils
  d. stamens
  e. stigmas

Question 2

The pea plant was an excellent choice for Mendels
  experiments because
  a. true-breeding varieties were available.
  b. the plant can self-fertilize.
  c. it can be cross-fertilized.
  d. true-breeding varieties were available, and it can
  be cross-fertilized.
  e. true-breeding varieties were available, the plant
  can self-fertilize, and it can be cross-fertilized