Angiosperms (Final Exam) Flashcards
angiosperms aka
anthophyta
angiosperms =
flowering plants
angiosperm ovules are
in carpels
carpels =
(female sporophylls)
carpels = ovary + stigma + style
angiosperm fertilization =
double fertilization leading to a zygote (egg + sperm) & triploid endosperm (polar nuclei + sperm)
flowers are made of
vegetative leaves & sporophylls on branch w/ determinate growth
vegetative leaves =
(petals + sepals) ot tepals
sporophylls =
stamens (male) + carpel (female)
carpels are often
fused into pistil
angiosperm female gametophytes are
extremely reduced
angiosperm sperm…
lack flagella (convergent w/ conifers)
angiosperm stamen have
2 pollen sacs (male sporophylls)
angiosperm phloem have
sieve tubes and companion cells
angiosperm ovary becomes
fruit
study flower diagram
plzzzzzzz
trends in flower evolution: (3)
- # of flower parts (indeterminate –> determinate)
- flower part arrangement (alternate helical –> whorled)
- ovary position (superior {above other parts} –> inferior {below other parts})
Amborella trichopoda is the
most basal extant flowering plant (sister to all other flowering plants)
Amborella trichopoda is
dioecious
Amborella trichopoda parts are
indeterminate (no set #)
Amborella trichopoda have no
vessels (only has tracheids for water transport)
Nymphaeales =
water lily lineage
Nymphaeales # of flowers are
indeterminate (there are many)
Nymphaeales are the
2nd oldest lineage of angiosperms
Nymphaeales are
herbaceous (non-woody)
Monocotyledons lack
true wood & 2* P
Monocotyledons leaf venation =
parallel
Monocotyledons stele =
atactostele
Monocotyledon flower parts are in
multiple of three
Monocotyledons # seed leaves =
one cotyledon
Eudicots =
derived (everything else is basal)
are Eudicots the only group with 2 cotyledons?
no, but all of the major lineages of dittos have 2
Eudicots pollen have
3 apertures (openings) - other groups have 1
Eudicots have distinctive
sepals and petals
- monocots do not necessarily have this trait
Eudicots flower parts in
multiples of 4 but mostly parts 4