1. Multicellular Organisms
Section 2.2

2. Plants Producers – make their own food Autotrophs – self feeder
Photosynthesis – captures sunlight and
converts to chemical energy
Chemical energy (food) is often stored in
the form of starch
H2O + CO2  C6H12O6 + O2

3. Plants Break down starch into sugar to get energy Cellular respiration
C6H12O6 + O2  CO2 + H2O + Energy

4. Adaptations Allow plants to live in a variety of environments
Examples: Rate of reproduction, amount of water, temperature, and protection

5. Examples of Adaptations
Grasses have deep roots
Seeds can be produced quickly
in some plants
Deciduous trees Conifers Palm trees Cactus

6. Response to Environment
Gravity – plants have a sense of up and down
Roots grow down; stems grow up
Touch
Tendrils – special cells that respond to touch of nearby objects
Light
Plants bend toward light with the help of hormones

7. Hormones
A chemical produced in one part of an organism and travels to another part to produce a reaction
Auxin – stimulates
growth
Moves away from light

8. Respond to seasonal change
Shorter amounts of daylight cause trees to go into dormancy or some plants to die
Amount of daylight can cause production of flowers