View
5
Download
0
Category
Preview:
Citation preview
Kingdom Plantae
Bryophytes (non vascular)
- mosses
Plant Kingdom
Tracheophytes (Vascular)
Seedless
- ferns
Seeds
- Most Plants
Alternation of Generations
Switching between sexual and asexual forms of reproduction in alternating generations
Ferns
Seed plants
Gymnosperms - pines - spruces - firs
Angiosperms
Monocots - grass - corn
Dicots - maple tree - rose
Gymnosperms
“naked seeds”
about 750 known species
seeds don’t have protective ovaries
conifers are most common
pines, firs, spruces
Gymnosperms
Angiosperms
“flowering plants”
about 250,000 known species
two types:
monocots: lilies, grasses
dicots: maple trees, roses
Monocots vs. Dicots
Angiosperms (cont.)Flower= reproductive structure
Most pollination occurs by insects and other animals
sepals: protect flower before opening
petals: attract pollinators
stamens: “male” portion
carpels/pistils: “female” portion
Stamen
Made of:
anther: pollen production
filament: stalk; raises pollen up higher
Carpel/Pistil
Made of:
Stigma: sticky
Style: long tube
Ovary: contains ovules
Fruit
mature ovary
protect dormant seeds and aid in dispersal
SporophytePlant with flower
Produces microspores (form male gametophyte) and megaspores (form female gametophyte)
Pollen grain: immature male gametophyte
Each has two haploid cells
Ovules: develop in ovary
contain female gametophyte (embryo sac)
Embryo sac: Usually have 7 haploid cells
Recommended