plants!!! “stationary animals that eat sunlight!!”
TRANSCRIPT
Plants!!!“Stationary Animals that
Eat Sunlight!!”
What is a plant?Plants are multicellular Eukaryotes
that have cell walls made of cellulose and carry out
photosynthesis using green pigments called chlorophyll.
Overview of the Plant Kingdom
Four Main groups of Plants:
1. Mosses2. Ferns3. Gymnosperms - cone bearers4. Angiosperms - flowering plants
Overview of the Plant Kingdom!!!
Overview of the Plant Kingdom
Four Main groups of Plants:
Mosses!!- Have spores, not seeds
- Have no roots
Ferns!!- Also have spores not seeds
- Have roots
Gymnosperms!- Are cone bearing plants like
Pine trees- Their seeds are naked!
Angiosperms!- Are flowering
plants!!- Their seeds are
surrounded by a fruit.
- They make up 90% of all
plants alive today
Plant Plant ClassificationClassificationNon-flowering
Plants
Flowering
Spore-bearing
Naked seeds
No roots
with roots
Mosses Ferns
Gymnosperms
1 seed-leaf
2 seed-leaves
Monocots Dicots
Angiosperms!Angiosperms are divided into 2
distinct groups named for their number of seed leaves:
1.Monocots2.Dicots
Monocots vs. Dicots
Angiosperms!Stems can be:
Herbaceous – green and soft stemmed. Ex:
dandelions
Woody – tough and strong stemmed. Ex: trees and
roses
Angiosperms!Lifespan can be:
Annuals – live ONLY one year
Biennials – live ONLY two years
Perennials – live many years
Plant Parts!!!Plants have three main organs:
1.Roots2.Stems3.Leaves
Plant Parts!!!Plant Organ
Function
Roots Absorbs water and nutrients.Anchors plant to the ground.
Stems Supports the plant body.Transports water and nutrients.
Leaves Capture sunlight for photosynthesisGas exchange (stomata)
Plant Vascular (transport) Systems!A plant’s vascular
system (think veins) carries
water and sugary sap all the way
through the plant from roots to
stem to leaves.
Plant Vascular (transport) Systems!
Two types:1. Xylem – carries water from
roots to rest of the plant2. Phloem – carries sugars (called sap) from the leaves
to the rest of the plant
Plant Roots!Two Main Types:
1.Fibrous Roots – fine, branching roots (Ex.: grasses)
2.Tap Roots – one large root (Ex: carrots!)
Tap vs. Fibrous Roots
Plant Stems!I want you to be aware of:
Rhizomes - a specialized underground stem.
Rhizomes
Rhizome vs. Rhizoid
Plant Leaves!Stomata (opening on underside of
leaves for gas exchange) are found here.
Stomata are opened and closed by guard cells that surround the
stoma.
Closing stomata prevents water loss and keeps the plant from drying
out.
Stomata/Guard Cells
Plant Kingdom
Flowering Plants
Non-flowering Plants
3 groups
FernsFernsMossesMosses GymnospermsGymnosperms
Non - flowering Plants
Do NOT produce flowers
2 2 groupsgroups
MonocotyledonsMonocotyledons DicotyledonsDicotyledons
Flowering Plants
roots, stems, leaves
vascular tissues (transport)
flowers, fruits (contain seeds)
Plant ClassificationPlant Classification
Non-flowering
Plants
Flowering
Spore-bearing
Naked seeds
No roots
with roots
Mosses Ferns
Gymnosperms
1 seed-leaf
2 seed-leaves
Monocots Dicots