1 AP Biology AP Biology 2007-2008 Domain Eubacteria Domain Archaea Domain Eukarya Common ancestor Kingdom: Plants Domain Eukarya AP Biology Evolution of Land Plants 500 mya land plants evolved special adaptations for life on dry land protection from drying = desiccation waxy cuticle gas exchange (through cuticle) stomates water & nutrient conducting systems from roots/soil to leaves xylem & phloem protection for embryo seeds AP Biology Plant Diversity Bryophytes non-vascular land plants Pteridophytes seedless vascular plants Gymnosperm pollen & “naked” seeds Angiosperm flowers & fruit pollen & seeds vascular system = water conduction mosses ferns conifers flowering plants colonization of land Tracheophytes xylem cells = tracheids Ancestral Protist flowers monocot 1 seed leaf dicot 2 seed leaves AP Biology Animal vs. Plant life cycle diploid multicellular individual 2n diploid multicellular sporophyte 2n haploid multicellular gametophyte 1n haploid unicellular gametes 1n gametes 1n Animal Plant alternation of generations meiosis fertilization mitosis mitosis mitosis fertilization mitosis no multicellular haploid meiosis spores 1n zygote 2n zygote 2n AP Biology diploid haploid Bryophytes: 1 st land plants Where must mosses live? Bryophytes: mosses & liverworts vascular system? No! non-vascular no water transport system no true roots dominant stage? haploid gametophyte stage reduced, dependent sporophyte fuzzy moss plant you are familiar with is haploid reproduction? swimming sperm flagellated spores sprout to form gametophyte AP Biology Bryophytes: mosses & liverworts
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Plant Classification Notes · 2/10/2014 · water & nutrient conducting systems ... AP Biology Animal vs. Plant life cycle diploid multicellular individual 2n diploid multicellular
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AP Biology
AP Biology 2007-2008
DomainEubacteria
DomainArchaea
DomainEukarya
Common ancestor
Kingdom: PlantsDomain Eukarya
AP Biology
Evolution of Land Plants 500 mya land plants evolved
special adaptations for life on dry land protection from drying = desiccationwaxy cuticle
gas exchange (through cuticle)stomates
water & nutrient conducting systems from roots/soil to leavesxylem & phloem
protection for embryoseeds
AP Biology
Plant Diversity
Bryophytesnon-vascularland plants
Pteridophytesseedless
vascular plants
Gymnospermpollen &
“naked” seeds
Angiospermflowers & fruit
pollen & seeds
vascular system = water conduction
mosses fernsconifers
flowering plants
colonization of land
Tracheophytes
xylem cells = tracheidsAncestral Protist
flowers
monocot1 seed leaf
dicot2 seed leaves
AP Biology
Animal vs. Plant life cycle
diploidmulticellular
individual2n
diploidmulticellularsporophyte
2n
haploidmulticellulargametophyte
1n
haploidunicellulargametes
1n
gametes1n
Animal Plant
alternation of generations
meiosis
fertilization
mitosis
mitosismitosis
fertilization
mitosis
no multicellularhaploid
meiosis
spores1nzygote 2n
zygote 2n
AP Biology
diploidhaploid
Bryophytes: 1st land plants
Where mustmosses live?
Bryophytes: mosses & liverworts vascular system? No! non-vascular no water transport system no true roots
dominant stage? haploid gametophyte stage reduced, dependent sporophyte fuzzy moss plant you are familiar
with is haploid reproduction? swimming sperm flagellated
spores sprout to form gametophyte
AP Biology
Bryophytes: mosses & liverworts
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AP Biology
AP Biology
Peat Bog“Peat Moss”
AP Biology
Pteridophytes: 1st vascular plants diploid
haploid
Pteridophytes: ferns vascular system? Yes! vascular water transport system xylem, phloem, roots, leaves