1. Bellwork! These have membrane-bound organelles and a nucleus: These have no membrane-bound organelles, and no true nucleus. The ___________ maintains a cell’s homeostasis by being selectively permeable. The ____________ is the energy powerhouse in a Eukaryotic cell

2. Agenda Final lab report due Friday (will count as a major) Office hours: before school tomorrow Cell quiz this upcoming Monday (2/23), Benchmark test (on everything we have covered on Thursday (2/26)

3. Today! Standard B-2: You will demonstrate an understanding of the structure and function of cells and their organelles. Objectives: I will be able to understand the functions of different cellular structures, along with illustrate each structure as it appears in the cell.

4. Speaking of Global Warming: https://www.youtube.com/watch?v=- 7LEYOu4rCMhttps://www.youtube.com/watch?v=- 7LEYOu4rCM https://www.youtube.com/watch?v=M2Jxs7l R8ZI

5. Cell Size Make Practice Quiz Print B notes Make Copies –Notes, stuff to do. (get poster) Website Grade tests

6. Prokaryotes vs. Plants vs. Animals OrganelleProkaryotes Eukaryotes PlantsAnimals Plasma Membrane Cell Wall Nucleus DNA Mitochondria Chloroplasts Ribosomes

7. Prokaryotes vs. Plants vs. Animals OrganelleProkaryotes Eukaryotes PlantsAnimals Endoplasmic Reticulum Golgi Apparatus Lysosomes Vacuoles Cytoplasm Cilia or Flagella

8. Unit 3- The Cell 3b- Cell Types + Organelles

9. Cell Size Cells will grow larger to a certain point then their growth will slow down –Eventually, they will stop growing & divide into two smaller cells –These smaller cells will then grow until they eventually divide Why not just keep growing?

10. Surface Area vs Volume Materials must pass into & out of the cell through its surface –The further materials travel, the more time &/or energy must be used to move them Larger cell=greater surface area for exchanging materials –BUT it also means larger volume through which materials must travel Cells must maintain the proper surface area-to-volume ratio –Membranes in the cell are often folded to create greater surface area for exchange

11. Cytoskeleton A network of protein filaments that help the cell with maintaining shape, support, and movement In eukaryotic cells

12. Unit 3- The Cell 3c- Fungal Cells & Viruses

13. How are fungal cells different than plant cells? Fungal cells contain a cell wall that is made of chitin, not cellulose like plant cell walls. May have several nuclei in a single cell. Do NOT have chloroplasts because they are heterotrophs

14. Viruses Virus- a non-living particle made up of of a nucleic acid and either a protein or a lipid-protein coat. Cause many diseases in living organisms Useful tools for genetic research.

15. Virus Structure & Reproduction Extraordinarily small; smaller than prokaryotes No cytoplasm & no organelles= cannot carry out cell functions Can’t grow by dividing

16. A virus must enter a living cell and use the host cell’s ribosomes, enzymes, energy, and other molecules in order to reproduce. Virus Structure & Reproduction Ebola Are Viruses Alive?