Cells, People, Size, And Specialization Flashcards Preview

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Flashcards in Cells, People, Size, And Specialization Deck (16):
0

Used a microscope to examine cork. First used the term cells (1665)

Robert Hooke

1

Dutch microscope maker; first to see living microorganisms (1673)

Anton Van Leeuwenhoek

2

German botanist; all plants are made of cells (1838)

Matthias Schleiden

3

German zoologist; all animals are made of cells (1839)

Theodor Schwann

4

German medical doctor; all cells come from other cells (cell division)(1855)

Rudolph Virchow

5

Parts of Cell Theory

All living things are made of cells
Cells are the basic unit of life (structure and function)
Cells come from other cells

6

American biologist; somer organelles were once free living cells (endosymbiotic theory)(1970)

Lynn Margulis

7

Evidence for Endisymbiotic theory

Mitochondria and chloroplast have circular DNA like bacteria
M and C have ribosomes whose size and structure are like B ribosomes
M and C replicated using binary fusion like B
M and C inner membranes have similar composition to B membranes

8

Size of micron

1 cm = 10,000 microns
1 in = 25,000 microns

9

Multicellular organisms have...

Many different cells with different jobs

10

Cells become specialized by...

Turning certain genes on and off (differentiation)

11

Order

Atoms-Molecules-Organelles-Cells-Tissues-Organs-Organ Systems-Organism

12

Uses compound lens (4x,10x,40x)

Light microscope

13

10x-20x, 3D view of larger specimens

Stereoscope

14

For things too small for light microscope, uses electrons to magnify 2 million x, kills things being observed

Scanning Electron Microscope

15

Uses electrons and passes them through specimen (must be thin)

Transmission Electron Microscope