All plants:
• Are Multicellular
• Are Autotrophic – photosynthetic
• Have cell walls with cellulose (that polysaccharide that we can’t digest – burp!)
• Have chloroplasts in their cells.
stems
• Support leaves and flowers
• Transport water and nutrients within plant
• May be used for storage (potato)
Flower – reproductive organ
• Produces male and female gametes
• Provides structure for fertilization
Plants in the biosphere
• Producers – base of thefood chain.– Energy in plants is transferred to all other organisms when the plants get eaten
Human uses:
• Agriculture: 90% of the food you eat directly or indirectly comes from only 20 different kinds of cultivated plants: – Rice, corn, wheat, potatoes, etc.
Plant cells
• Rigid cell wall of cellulose and other tough materials
• Cells are connected to each other by shared cytoplasm
• Large central vacuoles
Plant tissuestissue= group of similar cells performing
the same function• Dermal – protective, covering
– Outermost layer– Protection – includes
bark in trees– Some cells contain
chloroplasts, so they perform photosynthesis
• Vascular tissue – transport or conduct materials around plant
Xylem – water and minerals up
phloem – food
down
Pollination – transfer of pollen from anther to carpel
• Self pollination…………….
• Wind pollination……….
• Insect/bird/bat pollination
Classification of Plants
B ryophytesnonvasc ular
spore produc er
S eed less V asc ular P lantsferns
reproduc e us ing spores
G ym nosperm snaked seeds
m any produc e c ones
m onoc otsseed has one c otyledon
d ic otsseed has 2 seed leaves
A ng iosperm sflow ering seed p lants
seed p lantsreproduc e us ing seeds
V asc ular p lantsc onta in xylem and phloem
P lantsm ultic e llu larautotrophic