Transcript Environmental Stimuli & Physical Responses

How Plants Are Classified
The Big Two
Link
What’s the purpose of a hose pipe?
?
Essential Question
• How are plants classified into two main
groups?
– Does the stem/leaf have tubes?
• Yes – Vascular
• No - Nonvascular
Vascular Plants
• The largest group
• Well developed system for transporting water &
food
• True roots, stems, & leaves
• Tube-like structures that support plant &
circulate water & food
Vascular Plants
• Two main groups of
vascular based on
stem type
– Woody stems: trees
& shrubs (tall)
– Herbaceous stems:
grasses, dandelions,
tomato plants (soft,
shorter stems)
Have you heard Buzz Lightyear’s
new nickname?
It’s herbaceous….because he’s not
Woody!
Xylem & Pholem
• Xylem – moves water from roots to plant
• Pholem – moves food from leaves to plant
(food and pholem start with the same sound)
Xylem & Pholem Dance
Draw some vascular plants
Nonvascular Plants
• No well-developed system for transporting
water and food
• No true roots, stems, or leaves
• Must get resources directly from the
environment
• Passes on water and food cell-by-cell
Draw these nonvascular plants
Moss
Liverwort
Nonvascular Plants
• Line up along the outside of the classroom,
shoulder to shoulder.
• Find a way to pass water from one end to the
other using a cup.
• Was this effective?
• Why do you think nonvascular plants are
small?