1. Biology PAP November 1, 2017
Please turn in your POGIL on Photosynthesis and Respiration
I will check to see that you finished the worksheets on photosynthesis.
Make sure you have a pen out to fill in notes on energy and food pyramids

2. Chapter 3.2 Energy Flow

3. Sun = primary / main source of energy
The Sun
Sun = primary / main source of energy

4. Autotrophs vs Heterotrophs
Autotrophs make their own food
Producers = eaten by other organisms who can not make their own food
Examples
Plants = photoautotrophs
Bacteria = chemoautotrophs
Heterotrophs must eat something (producers/other heterotrophs) to obtain energy
Consumers = they consume (eat) producers/other consumers

5. Types of Heterotrophs Herbivores – eat only plants
Carnivores – eat only other animals
Omnivores – eat both plants and other animals
Detritivores – feed on plant and animal remains
Decomposers – break down organic matter

6. Energy Flow
Energy flows in one direction

7. Trophic Level Each step in a food chain is called a trophic level
Only 10% of the energy available is transferred to the higher trophic level

8. What happens to the rest of the energy?
Remaining energy is given off as heat - It take energy to eat and then digest food

9. Biomass Pyramid
Biomass pyramids = amount of living matter/food available at each trophic level
Mass = grams / area

10. Relative number of organisms at
Pyramid of Numbers
Relative number of organisms at
each trophic level

11. Biomagnification
Chemicals (copper, DDT, mercury) are stored in animal tissues and become magnified as you move higher up the food chain

12. Feeding Relationships
Food Chain vs. Food Web