Introduction to Plants Part 1
Susan B. Anthony Middle School
7th Grade Life Science
Mr. Pezzuto
4-24-12
DO NOW QUIETLY To the Left is a
picture of a
Bee Orchid
(Ophrys
apifera)
Explain how
this adaptation
increases the
fitness of this
flower.
Learning Goals for Today
Know how plants use the sun for energy.
What are the general characteristics of
plants?
Parts of the flower (male and female)
General Characteristics of Plants
Turn and Talk: define terms
with your group (15 seconds)
Eukaryotes-
Multicellular
Autotrophs-
Cells
Contain Cell Walls
Contain Chloroplasts
Heterotroph vs. Autotroph
Autotroph:
Heterotroph:
Heterotroph or. Autotroph
General Characteristics of Plants
Plant cells typically have a cell wall, a
boundary that surrounds the cell
membrane and protects the cell
Cell walls are mostly made of
CELLULOSE
All plants have chloroplasts, where they
photosynthesize using the pigment
chlorophyll.
Photosynthesis
Photosynthesis is the process of
converting carbon dioxide gas and water
into glucose and oxygen.
6CO2 + 6H2O + sunlight -> C6H12O6 + 6O2
6CO2+6H2O è C6H12O6 + 6O2
Carbon dioxide + Water è Sugar + Oxygen
6CO2+6H2O è C6H12O6 + 6O2
Carbon dioxide + Water è Sugar + Oxygen
Photosynthesis Continued
6CO2+6H2O C6H12O6 + 6O2
Carbon dioxide + Water è Sugar + Oxygen
The SUN does not MAKE the food!
The Sun POWERS the food-making.
Sun = oven
Sun is NOT the sugar in the recipe!
Angiosperms v.s Gymnosperms
Plants are separated into two classes
Angiosperms are flowering plants.
Gymnosperms are seed
producing plants.
A Tulip is a
Great
Example of an
Angiosperm
Turn and Talk:
From what you know about
flowers from science this
year, how do plants
reproduce using flowers?
(Think Mendelian Genetics)
Parts of the Flower
Sepals-green leaf-like part, covers
and protects bud before opening
Petals-modified leaves-attract
animal pollinators
Male Parts
Anther (produces pollen)
and Filament = stalk
Female Parts
Stigma-top-sticky, hairy, feathery-catches pollen
Style - tube leading from stigma to ovary
Ovary- where eggs are located in
Ovules which develop into the seeds in
(Ovary develops into fruit)
Sunflowers
have a large
Stigma
Based on the Video
Ticket to leave http://www.youtube.com/watch?v=4YQ5q1cjEU4
What are two ways in which hermaphroditic
angiosperms self pollenate?
How have some angiosperms adapted to
maximize self pollination by bees?