fig. 30-2
DESCRIPTION
PLANT GROUP. Mosses and other nonvascular plants. Ferns and other seedless vascular plants. Seed plants (gymnosperms and angiosperms). Reduced, independent (photosynthetic and free-living). Reduced (usually microscopic), dependent on surrounding sporophyte tissue for nutrition. Gametophyte. - PowerPoint PPT PresentationTRANSCRIPT
Fig. 30-2
Reduced (usually microscopic), dependent on surroundingsporophyte tissue for nutrition
Reduced, independent(photosynthetic andfree-living)
Gametophyte
Sporophyte(2n)
Sporophyte(2n)
Gametophyte(n)
Sporophyte
Example
Gametophyte(n)
Dominant
Dominant DominantReduced, dependent ongametophyte for nutrition
Mosses and othernonvascular plants
Ferns and other seedlessvascular plants
Seed plants (gymnosperms and angiosperms)
PLANT GROUP
Gymnosperm Angiosperm
Microscopic femalegametophytes (n) insideovulate cone
Microscopic malegametophytes (n) inside pollencone
Sporophyte (2n) Sporophyte (2n)
Microscopic femalegametophytes (n) insidethese partsof flowers
Microscopic malegametophytes (n) insidethese partsof flowers
Fig. 30-2c
Reduced (usually microscopic), dependent on surroundingsporophyte tissue for nutrition
Dominant
Seed plants (gymnosperms and angiosperms)
Gymnosperm AngiospermMicroscopic femalegametophytes (n) inside ovulate cone
Microscopic malegametophytes (n) inside pollencone
Sporophyte (2n) Sporophyte (2n)
Microscopic femalegametophytes (n) insidethese partsof flowers
Microscopic malegametophytes (n) insidethese partsof flowers
Example
Gametophyte
Sporophyte
Fig. 30-6-4
Microsporangium (2n)
Microsporocytes(2n)
Pollengrains (n)
Pollencone
Microsporangia
MEIOSIS
Maturesporophyte(2n)
Haploid (n)Diploid (2n)
Key
MEIOSIS
Survivingmegaspore (n)
Pollengrain
Megasporocyte (2n)
Ovule
Integument
Ovulatecone
FERTILIZATION
Pollentube
Femalegametophyte
Spermnucleus (n)
Egg nucleus (n)
Archegonium
Seedling
Seeds
Seed coat(2n)
Foodreserves(n)
Embryo(2n)
Megasporangium(2n)
Fig. 30-13mMonocot
CharacteristicsEudicot
Characteristics
Vascular tissueusually arranged
in ring
Veins usuallyparallel
Veins usuallynetlike
Vascular tissuescattered
Leafvenation
One cotyledon
Embryos
Two cotyledons
Stems
Roots
Pollen
Root systemusually fibrous(no main root)
Pollen grain withthree openings
Taproot (main root)usually present
Pollen grain withone opening
Floral organsusually in
multiples of three
Flowers
Floral organs usuallyin multiples of
four or five