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Distinguish between the bryophytes and ferns
Identify features of the nonvascular plants
Identify features of the seedless vascular plants
Identify features that distinguish plants from algae
Describe the relationship between sporophytes, gametophytes and alternation of generations
Describe ecological and economic roles of bryophytes and ferns
Apical meristem in key resource-finding locations
central spot from which all cells divide, mitosis takes place here
alternation of generation more developed
diploid or haploid?
spore: haploid (produced by meiosis)
Embryos dependent on female parent plant (similar to placental mammals)
"Embryophytes"...not free living
other gymnosperm info
Waxy cuticle that prevents drying
Secondary metabolites (products of pathways that are side branches off main metabolic pathways)...used for defense...algae don't do that!
Bryophytes (liverworts, hornworts, mosses)
location: light but not direct sun, shady, wet, etc
characteristics: bright green, always small
sexual reproduction for gametophytes
palm-tree like structure
archegonium: produce egg
antheridium: produce sperm
MUST BE: submerged in water for sperm to swim to egg
more moss info:
Location: Moist forests and wetlands
Even found in extremely dry climates as long there is water at critical time
"Feathery" or "cushiony"
No vascular tissue (no capacity to transport water)
Small (do you see a connection here?)
Usually only a few cells thick, with no cuticle
Anchored by rhizoids (root-like structures...no way to absorb water)
Ecological role of bryophytes
Form microhabitats for animals
Carbon reservoirs in peat bogs store carbon dioxide and help to stabilize global CO2 levels
Ecological "barometers"...mosses very susceptible to toxins/pollution
Economic role of bryophytes
Peat is source of fuel
Mosses and liverworts in greenhouses...like a weed...can quickly cover flats of seedlings
support differences between mosses and ferns
moss: center has sclerenchyma and parenchyma for support
fern: xylem and phloem
fern examples, locations, characteristics, life cycles
shady, moist environments
packages with spores inside...distinct and help distinguish between ferns
each sori has millions of sperm
are there any ferns native to san diego?
which look least typical of a fern? coffee and cotton fern
sori are used to distinguish with color and pattern
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