1. Cell PEOPLE, Cell Size, and Cell Specialization Chap 7-1 & 7-4 t

2. ______________________
1665-
______________________
used a microscope to examine a thin slice of cork and saw “little boxes”
He called them “CELLS” because they looked like the small rooms that monks lived in called Cells
Microscope image: Cork image:
Hooke image:

3. ___________________________________
1673-
___________________________________
a Dutch microscope maker was the first to see LIVING ORGANISMS.
Microscope/Leeuwenhoek image: Animation from:

4. 1838- German botanist __________________________concluded that
ALL PLANTS
are made of cells
Plant image: Schleiden image:

5. _________________________concluded that
1839- German zoologist
_________________________concluded that
ALL ANIMALS ARE MADE OF CELLS
Schwann image:
Animals image:

6. medical doctor _____________________ saw dividing cells
1855-
German
medical doctor _____________________
saw dividing cells
in the microscope
and reasoned that
cells come from
other cells
Virchow:
Mitosis:

7. CELL THEORY 1. All living things are ________________________.
2. Cells are the basic unit of
____________ & _____________ in an organism.
(cell = basic unit of _____________)
3. Cells come from the reproduction
of ____________ cells
Cell image:

8. American Biologist _____________________ Provided evidence for
1970-
American Biologist _____________________
Provided evidence for
the idea that ancestors of
____________ + _____________ were at one time free-living prokaryotes that were engulfed by other cells and stayed to live symbiotically inside
= _________________________

9. ENDOSYMBIOTIC THEORY See a movie about ENDOSYMBIOTIC THEORY

10. Evidence for Endosymbiotic theory
Mitochondria and chloroplasts are ONLY ORGANELLES with ____________________ + ______________
Mitochondria, chloroplasts, and Bacteria
~ ALL have one circular _______ loop
~ ALL have __________________ with similar structure that are different from Eukaryotic ribosomes
~ ALL reproduce using _________________
~ ALL have similar membrane _________________

11. All living things made of cells BUT… organisms can be very different.
Image from:
UNICELLULAR
MULTICELLULAR

12. CELL SIZE
Typical cells range from: 5 – 50 micrometers (microns) in diameter

13. How big is a micron ( µm ) ? 1 cm = 10,000 microns 1” = 25,000 microns
1 cm = 10,000 microns ” = 25,000 microns

14. MULTICELLULAR ORGANISM don’t just contain MANY CELLS.
They have different kinds of cells
doing different jobs
Image from:

15. Cells in a multi-cellular organism become SPECIALIZED by turning different genes on and off
Image from:
Cell Specialization =DIFFERENTIATION

16. SPECIALIZED ANIMAL CELLS
Muscle cells
Red blood cells
Cheek cells

17. Specialized Plant cells
Guard cells
Xylem cells
Pollen
Guard cells:
Xylem:
Pollen:

18. ________ __________  ___________
________ __________  ___________
IMAGE SOURCES: see last slide

19. ____________  ____________ 
____________  ____________ 
Similar cells working together
IMAGE SOURCES: see last slide

20. ___________  __________ ___________
___________  __________ ___________
Different tissues working together
Different organs working together
IMAGE SOURCES: see last slide