AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!


angiosperms - 240,000 species 

  • dominant for over 100 million years
  • 3 major advances - flower, broad leaves, fruits
  • flower - male/female gametophytes
    • androecium creates pollen in anther
    • gynoecium creates eggs in ovary
    • pollen makes tube into ovary >> forms embryo >> seed
  • broad leaves - collects more sunlight
    • deciduous trees - leaves drop yearly (goes into dormant period)
  • fruits - seed package >> attracts pollinators
    • digested by animals >> dropped in feces (adds nutrients)
  • monocots - 1 cotyledon (seed leaf)
    • parallel veins in leaves
    • scattered vascular bundles
    • monosculate pollen
    • adventitious roots
    • floral parts in multiples of 3
  • dicots - 2 cotyledons, more woody than monocots
    • netted veins in leaves
    • vascular bundles in rings
    • tricolpate pollen
    • primary/adventitious roots
    • floral parts in multiples of 4, 5
Subject X2: 

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!