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?