Download 12C Major Plant Groups

Major Plant Groups
SWBAT name the three main groups of
plants; distinguish between vascular
and nonvascular plants; describe the
main parts of a fern; explain the
difference between gymnosperms and
angiosperms
Major Plant Groups
• What are the three main groups of
plants and what defines them?
– Vascular
• Have vascular tissue to conduct water
and other materials
– Seeded
» Use seeds to reproduce
– Seedless
» Use spores to reproduce
– Nonvascular
• Do not have vascular tissue
Nonvascular Plants
• How are water and other materials
transported in nonvascular plants?
– Water moves by diffusion
• the movement of molecules from a place of
many to a place of few
• Describe nonvascular plants.
– They are generally short because they
don’t have xylem to move water
– They lack certain organs that vascular
plants have (leaves, roots, stems)
– They have a single layer of cells that
resemble leaves
– They use gametes to produce spores, not
seeds
• Mosses, liverworts, and hornblende are
nonvascular plants
Seedless Vascular Plants
• Describe seedless vascular
plants.
– They grow taller because they can
transport water
– Require water to move the cells
involved in reproduction
• Club mosses, horsetails, and ferns
Ferns
• Describe the main parts of a fern.
– Frond
• Leaves
– Rhizome
• The fronds are attached to this and
roots grow from it
– Crosiers/Fiddleheads
• Tight coils that are the beginning of
frond growth
– Spores
• Located on the lower surface of the
frond
• Used for reproduction
Seeded Vascular Plants (seed plants)
• Describe seed plants
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These are the most familiar plants
They do not need water for reproduction
Use seeds for reproduction
Seeds are hardier than spores and fall into
two main groups:
• Gymnosperms
– “naked seed”
– Seeds are not fully covered or shielded
from the environment
• Angiosperms
– “covered seed”
– Seeds are surrounded by protective
covering called fruit