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Home Q & A Board Biology-Related Homework Help General Biology
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Nudee88 Nudee88
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6 years ago
When pollen from one species lands on the stigma of a flower from another species
 
  a. the pollen tube typically does not develop.
  b. the pollen tube typically forms, but the sperm cannot penetrate the egg.
  c. the pollen tube typically forms and grows to the ovary, but then stops.
  d. the pollen tube typically forms, but the sperm are killed.
  e. the pollen tube typically forms and the egg is usually fertilized, but the embryo rarely
  grows.

Question 2

Self-incompatibility in flowering plants is a biochemical recognition and rejection process that
 
  a. prevents both self-fertilization and self-pollination.
  b. prevents self-pollination and occasionally prevents self-fertilization.
  c. prevents self-fertilization but not self-pollination.
  d. prevents self-pollination but not self-fertilization.
  e. prevents self-fertilization and occasionally prevents self-pollination.
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leticia1977leticia1977
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6 years ago
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Nudee88 Author
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#2
6 years ago
Above and beyond my expectations for this site
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