Plant Evolution
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green algae
plant ancestors
bryophytes
2 on evolution list Moss new: cutin on leaves, multicellular gametangia
fern & allies
3 on evolution list seedless vascular plant. Devonian period
major evolutionary events in seed plants
evolution of seeds & evolution of pollination
what changed with the evolution of seeds
-pollination replaces sperm swimming to egg -adapted for terrestrial life -seed is sporophyte, embryo, food supply in protective coat -gametophyte is reduced and dependent on sporophyte
gymnosperm
4 on evolution list naked seed. wind pollination. woody plants.
angiosperm
5 on list flowering plant
major evolutionary event with flowering plant
co evolved with pollinators evolution of fruits
prokaryote
no nucleus. bacteria, Cyanobacteria, blue-green algae
eukaryote
has nucleus
protista
algae. eukaryotic, not land plant, animal, or fungus
pterophyta
fern. vascular plant that reproduces by spores
xylem
water.
phloem
sugar nutrients
algae has:
cell wall, neucleus, cell membrane, chloroplants
are plants 1 cell big
no.
gaemtangia
reproductive organs that produce sex cells
alteration of generations
plants alternate between 2 life stages (generations) during the life cycle
cutin
waxy layer on leaf
seed
structure that encloses and protects a developing embryo
evolution of pollination
transfer of male gametophyte to the female gametophyte without water
diploid
2n
haploid
1n
sporophyte
is the diploid multicellular stage in the life