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Flashcards in Scientists Deck (22):
1

Anton van Leeuwenhoek

First to observe & document living cells with lenses he crafted
17th century

2

Robert Hooke, 1665

Developed a microscope that enabled him to study cork tissue
Coined the term cell

3

Matthoas Schleiden, 1838

Studied living tissue & concluded that all plants are made of cells

4

Theodor Schwann, 1839

Stated that all animals are made of cells

5

Rudolf Virchow, 1855

"Where a cell exists, the ust be a preexisting cell"

6

Gregor Mendel, 1850s

Bred garden peas to study inheritance
3 laws

7

Griffith, 1927

Discovered bacterial transformation = ability of bacteria to alter their genetic make up by absorbing foreign DNA molecules from other baterical cells & incorporating foreign DNA into their own

8

Avery, MacLeod, McCarthy 1944

Published that Griffith's bacteria was transferring DNA

9

Hershey & Chase, 1952

Proved that DNA is molecule of inheritance
Tagged bacteriophages (viruses that attack bacteria)

10

Rosalind Franklin, 1950-53

Carried out X-ray crystallography analysis of DNA that showed DNA to be a helix

11

Watson & Crick

Correctly described the structure of DNA to be a double helix

12

Meselson & Stahl, 1953

Proved W&C, that DNA replicates in a semiconservative fashion
Cultured heavy & light nitrogen

13

Lamarack

Inheritance of acquired traits & use and disuse

14

Darwin

Survival of the fittest

15

Francesco Redi, spontaneous generation

Maggots arose only where flies were able to lay their eggs

16

Stephen J Gould & Niles Eldridge, Punctuated Equilibrium

New species appear suddenly after long periods of no change

17

Louis Pasteur, Spontaneous Generation

Microorganisms appear only as contaminants from air and not spontaneously

18

Tinbergen

Fixed action pattern, stickleback fish

19

BF Skinner

operant conditioning
Reward/punishment

20

Konrad Lenz

Imprinting
Ducklings

21

Karl von Frisch

Honeybee communication & bee waggle dance

22

G.F. Gause, Competitive Exclusion Principle

Two species cannot coexist in a community if they share a niche, compete for the same resources