animals (and some algae)
fungi (and some animals)
plants (and some algae)
land plants shared traits with charophytes
Rings of cellulose-synthesizing proteins (see figure), Structure of flagellated sperm, Formation of a phragmoplast
gametophyte
haploid and produces haploid gametes by mitosis
sporophyte
diploid, fusion of gametes and produces haploid spores by meiosis in sporangia
alteration of generations
gametangia
origin of gamete production; are haploid
female gametangia
archegonia
male gametangia
antheridia
liverworts, mosses, and hornworts
non-vascular plants
lycophytes, monilophytes, gymnosperms and angiosperms
vascular plants
lycophytes and monilophytes
seedless vascular plants
gymnosperms and angiosperms
seed plants
non- vascular plants (bryophyta)
gametophyte dominant
moss life cycle
bryophyte gametophytes
mature gametophytes produce flagellated sperm in antheridia and an egg in each archegonium
bryophyte sporophytes
grow out of archegonia; consists of a foot, seta (stalk), and sporangium (capsule) which discharges spores through a peristome
fern life cycle (seedless vascular plants)
sporophylls
modified leaves with sporangia
sori
clusters of sporangia on the underside of sporophylls
strobili
cone-like structures formed from groups of sporophylls
homosporous
produces one type of spore that develops into a bisexual gametophyte
heterosporous
produce megaspores (female gametophytes) and microspores (male gametophytes)
homosporous spore production
sporangium on sporophyll-> single type of spore-> typically a bisexual gametophyte-> eggs+sperm
heterosporous spore production
megasporangium on megasporophyll-> megaspores -> male gametophyte -> eggs (in archegonia)
microsporangium in microsporophyll -> microspore -> male gametophyte -> sperm (in antheridia)
the two clades of seedless vascular plants
phylum lycophyta and phylum monilophyta
phylum lycophyta
small herbaceous plants; many are epiphytes; microphylls
phylum monilophyta
ferms, horsetails, and whisk ferns
traits of seed plants
reduced gametophytes, heterospory, ovules, pollen
seed plant gametophytes
microscopic; remain withing the sporangia of parental sporophyte, and depend on sporophyte for nutrition
female gametophyte (seed plants)
develops within an ovule
male gametophyte (seed plants)
develops within a pollen grain
ovule
consist of a mega sporangium, megaspore and one or more integuments
unfertilized ovule
fertilized ovule
gymnosperm seed
gymnosperm
angiosperm
gymnosperm extant phyla
cycadophyta (cycads), ginkgophyta, gnetophyta, coniferophyta
phylum cycadophyta
large cones and palmlike leaves; flagellated sperm
phylum ginkgophyta
single living species; flagellated sperm; high tolerance to air pollution
phylum gnetophyta
comprises three genera: gnetum, ephedra and welwitschia
phylum coniferophyta
largest gymnosperm phyla, mostly evergreens
pine life cycle