BIOLOGY 1B Lecture Notes - Lecture 5: Xylem, Pollen Tube, Monophyly
Document Summary
Majority of flowering plant group are in eudicot group. Basal lineage among living angiosperms is called amborella. Angiosperm phylogeny includes all living, known flowers on earth. Crown group angiosperms inclusive concept that includes all living members in that concept. Also includes an outgroup often a fossil. Archaefructus closest living relative to the angiosperms. Paleobotany person who studies plants that works on fossils. Not sure if it"s actually a true flower. Indicates that it probably was once an aquatic plant. This fossil structure of archaefructus may be reflective of a change in morphology due to an adaptation. Existed 125 million years ago with a thing called. Lives in islands of caledonia, around australia. Has primitive features in vascular system, but all of its descendants have vessels! Different morphological feature that separates itself from others (vasculature) Magnolia goes back 20 million years from fossils and dna. Rise of monocots from last 10 million years because grass growing everywhere.
