Download Plant ppt

DRQ
Plants are believed to have evolved
from green algae found in
lakes/ponds.
PREDICT: What adaptations have plants
evolved to live on land?
Write your answer. Then turn to your partner
& discuss your thoughts
Be prepared to share!
Plant Classification
-plants are multi-cellular
eukaryotes
-classified into 9 different phyla
-classified based on
distinguishing characteristics
-plants are thought to have
evolved from green algae
Plants are classified as either
vascular or nonvascular
1) vascular plants have a collection
of “pipelines” that bring water and
minerals up from roots, disperse
sugars down from leaves
-vascular tissue allows plants
to grow higher off the ground
Ex: trees, sunflowers
2) Nonvascular Plants
-have no special “pipelines”
-they grow close to the ground or
on tree trunks to absorb
water/nutrients directly
-EX: mosses, liverworts
Left Side Output
Open your books to page 615. Sketch
the plant & adaptations for life on land.
Label and define the following parts:
-pollen
-seeds
-stomata
-cuticle
-vascular system
-roots
DRQ
Plants are made up of different tissues.
Predict what the function of these tissues
are based on the picture below…
Plant Tissues
1) Dermal Tissue
-outside covering of the
plant, protects it
2) Ground Tissue
-makes up much of the
inside, provides supports,
stores materials
3)
Vascular Tissue
-contains tubes & vessels to
transport food in tubes called phloem and
Water in tubes called xylem
Sketch (left side) – 3 tissues of
plants
Meristem Tissue
-where new growth occurs
-source of new cells
Stem
Root
Tip
Roots
-make up over ½ the body of the
plant!
-anchor the plant to the ground
-absorb water & minerals from the
soil
-contain “root hairs” that spread
out through soil, increases surface
area to absorb water
STAP!! Stop-Think-And-Predict
Just above the root tip are tiny
projections called “root hairs”
1) What do you think is the
Function of “root hairs”?
2) What does this
function have to do with
“surface area”?
Root Hairs
-spread out through the spaces in
soil
-increase the surface area available
to take up water
Reproduction
-plants have special organs for
reproduction
-Seeds – storage device for plant
embryo
-Angiosperms-have seeds in
fruit/flowers
-gymnosperms- plants with no fruit
(most have seeds in cones)
-
Flowering Plants are
classified based on their
seeds
Dicots
Monocots
Two seed leaves
(called “cotlyedon”)
One seed leaf
Net-like veins
Parallel veins
Flower parts in fours Flower parts in threes
or fives
Ringed vascular
tissue
Scattered
Vascular tissue
Turn to page 668 – sketch figure 22.5.
Label & define the following
reproductive
parts:
-stamen
-anther
-filament
-pistil
-ovary
-stigma
-style
STAP - stop-think-and-predict
1) What function does this structure
serve in plants?
Leaves
-gather light for photosynthesis
-contain vascular tissue (veins) for
transporting food/water
-most have waxy covering called a
“cuticle” to prevent water loss
-upper side of leaf contains most of
the chloroplasts for
photosynthesis
-Underside contains stomata
which open and close to release
water (transpiration) & allow gas
exchange (for photosynthesis)
*What gases are exchanged during
photosynthesis?
Open your books to pgs 653 & 655
Divide your left side in half…
Sketch & label
21.12 on pg 653
Describe the
role of the
guard cells
Sketch & label
figure 21.14
on pg 655
Challenge Activity
With your team, brainstorm a list of
organs/tissues that are associated
with each of these plant processes:
1)Photosynthesis
2)Cell Respiration
3)Transpiration
4)Reproduction
**Hint – you should have 4 or more in
each column