Please enable JavaScript.
Coggle requires JavaScript to display documents.
Transportation, Seeds, Flowers, ovule diversity, precursor, precursor,…
Transportation
Stomata
Open after daybreak
Close by stress
Close at night
Domino effect
Cohesion tension theory
Water movement soil to atmosphere
Transpiration stream
Movement of water
Hypotonic to hypertonic solution
Passes through endodermis
Pulled up stem
Water diffuses out of xylem
Xylem to sieve tubes
Pressure flow hypo
Source to sink
Actively growing areas
Storage areas
Photosynthate moves by bulk flow
Root hair
Increase surface area
Water enters through root hair
Tension on molecules
Adhesion helps fight gravity
Seeds
pollen
#
transport by wind
some have air bladders
exine prevents dessication
microgametophyte
does not require water
mitosis within microspore wall
Seed plants
Gymnosperm
Angiosperm
3 celled
Earliest seed - Elkinsia
Primitive ovule
Enclosed ovule
Megasporangium
Innovations
Heterospory
#
Protection
Integuments
Pollen capture
Pollen chamber
Micropyle
Nucellus
Ovule evolution
Evolved from shoot apex
Nucellus apex
Similar genes
megaspores
#
Megagameotophyte
embryo multicellular
Egg retained
Undergoes meiosis
3 degenerate
Hausoria pollen tubes
Feed on nucellus (gymnosperm)
Long
Provide nutrients for developing sperm
Modify megasporangium apex
Pollen chamber
Program cell death
Micropyle
Microspores
#
Microgametophyte
Multicellular
Gametophyte dominant
#
Sperm develop in antheridia
Sperm rely on water to swim
Megasporocyte
Mega spore mother cell
Dominate
Great survival
Extra layer of protection
Flowers
ancestral flower
bisexual
radially symmetric
many petal layers
androecium
gynoecium
5 carpals
first flower fossil
Archaefructus sinensis
major traits
color
smell
may have scent glands
shape
actinmorphic= radially symmetry
zygomorphic=bilateral
bloom time
rewards
Nectar
Oil
Pollen
Four flower appendages
Sepals
#
Sterile
Outermost
Protect flower bud
Another name: calyx
Petals
#
Sterile
Contain pigments
Stamens
Male fx
Carpels
Female fx
collectively are the gynoecium
stamen
above petals
anther and supporting filaments
collectively the androecium
insertion
hypogynous
Ex: Lillies
epigynous
Ex: apple flower
perigynous
Ex: cherry flower
display variation
inflorescence
taxomic importance
ensure cross pollination
Pericarp
Exocarp
Meso carp
Endocarp
Major syndromes
Abiotic
Wind
Water
Biotic
Moth
Bee
Bird
(Incomplete flowers lack 1 appendage)
Floral axis shortened
male=androecious
female=gynoecious
hermaphroditic= perfect
ovule diversity
gymnosperm
#
nested doll
megaspore wall
eggs
Archegonium
Ex: lilly ovule
8 nucleate
embryo sac
1 megaspore
2 integ
angiosperm
single megaspore
addition protection
double fertilization
single megasporocyte
#
angiosperm ovule
2 integuments
furniculum
egg sac
seeds
pollination drops
increase offspring survival rate
Ex: pine
fleshy outer later
several cotyledons
integ becomes seed coat
monocot
Ex: corn
large amount of endosperm
#
eudicot
#
2 cotyledons
Ex: bean
Ex: pine ovule
pollen chamber
precursor
precursor
example:
common trait
shared trait
collectively called perianth
