Chapter 29: Plant Diversity p.1 Flashcards
Closest living relative
Charophytes
Shared ancestral characters with charophytes
- circular protein rings in plasma membrane to synthesize cellulose
- flagellated sperm
- sporopollenin
Traits that support life on land
waxy cuticle, stomata, mycorrhizal associations, secondary compounds
Key events in plant history
- multicellularity
- invasion of land
- evolution of vascular tissue
- appearance of seed plants
- evolution of flowers
Derived traits of plants
- alternation of generations
- sporopollenin-walled spores made in sporangia
- multicellular sporangia
- apical meristems
Bryophyte clades
Liverworts
Mosses
Hornworts
Bryophyte traits
“carpets” rather than branches
dominant gametophyte
prominant sporophyte
Protonemata
germinated spore that produces gametophores
Rhizoid
anchor of gametophyte (different from roots)
gametangia
where gametes are formed; separate male and female
archegonia
female gametangia; produces eggs
antheridia
male gametangia; produces sperm
Fertilization of bryophytes
sperm must swim through water to fertilize eggs, limiting mosses to moist habitats
Sporangium
sporophyte capsule
Seta
sporophyte stalk