1. Unit 1 Vocabulary Part I

2. Unit 1 Vocabulary – Part I
On your notecards (9) you will write the biology word on one side and the definition on the other. You have 20 minutes:
Heterotroph
Autotroph
Eukaryotes
Prokaryotes
Endosymbiotic theory
Organelles
Endocytosis
Mitochondria
Chloroplast

3. Endocytosis
The process of a cell eating or drinking. Particles go inside the cell

4. Endosymbiotic Theory
Unit 1: Day 1 Notes

5. The Endosymbiotic Theory
In your composition book write the next two bullet points
Title of Notes
Unit 1-Day 1- Endosymbiotic Theory - Notes
Write down the following learning targets
Learning Targets (what you are expected to learn:
What is a prokaryotic cell?
What is a eukaryotic cells?
What is the endosymbiotic theory?
Be able to explain the origins of the first eukaryotic cells on the planet

6. The Endosymbiotic Theory
The endosymbiotic theory is the idea that a long time ago, prokaryotic cells engulfed other prokaryotic cells by endocytosis. This resulted in the first eukaryotic cells.
This theory explains the origin of eukaryotic cells and provides an explanation on the origin of certain membrane-bound organelles

7. What Exactly Happened? Ancient Prokaryotes
Chloroplast
Plants and plant-like protists
Ancient Prokaryotes
Heterotrophic bacteria
Nuclear envelope evolving
Photosynthetic bacteria
Mitochondrion
Primitive Autotrophic (Photosynthetic) Eukaryote
Animals, fungi, and animal-like protists
Ancient Heterotrophic Prokaryote
Primitive Heterotrophic Eukaryote

9. Another look!

10. Membrane-Bound Organelles
Mitochondria = membrane-bound organelle that produces energy for the cell were once their own prokaryotic cell (billions of years ago)
Chloroplast = membrane-bound organelle that captures sunlight and uses it to make food for the cell were once their own prokaryotic cell (billions of years ago)

11. Membrane-Bound Organelles
Mitochondria = ancient aerobic prokaryote (aerobic prokaryote used oxygen to make energy like today’s mitochondria)
Chloroplast = ancient photosynthetic prokaryote (ability to convert light energy into chemical energy (glucose)).

12. ***Evidence in support of the endosymbiotic theory:***
Ancient prokaryotic cells have the same features as modern day mitochondria and chloroplasts to include the following:
Circular DNA (both chloroplast and mitochondria have their own DNA different from the host cell)
They have their own ribosomes
Binary fission (mitochondria and chloroplast can reproduce separately of the host cell)

13. ***More evidence in support of the endosymbiotic theory:***
4. Mitochondria and chloroplast have their own cell membrane (double membrane layer)
5. Mitochondria and chloroplast have their own cytoplasm

14. What it would look like today?