Unit 1 and 2 test (Scientists)

Question 1

Hans and Zacharias Jansen

Answer 1

Hans and Zacharias Jansen (1595)

• 2 lens system
• Magnification extending the reach of human eye (20x)

Question 2

Robert Hooke

Answer 2

Robert Hooke (1665)

• three lens system (2 ocular 1 objective)
• Invented word cell
• 38 imaged under microscope

Question 3

Antoni van leeuwenhoek

Answer 3

• 1665
• Single lens system similar to magnifying glass
• First person to see movement of celled organisms
• developed light microscopes with powers of (250x)

Question 4

Many people

Answer 4

• Compound light microscope

- uses 2+ curved lens + a light to magnify an object

Question 5

Francesco Reid

Answer 5

• 1668
• used 3 jars of meat to test theory of spontaneous generation
• Disproved spontaneous generation

Question 6

John needham

Answer 6

• 1775
• tested spont gen by boiling chicken broth in a flask
• boiled broth to kill micro organisms which would then “re appear”

Question 7

Lazzaro Spallanzani

Answer 7

• 1775
• refuted validity of needhams experiment
• Proved that air is required for micro organisms to grow

Question 8

Louis Pasteur

Answer 8

• 1864
• Used flask with various neck shapes to manipulate the access of dust to broth
• proved spont gen doesn’t occur and that microorganisms are found in air
• Air could access the flask but micro organisms would get trapped in the s-bend. No micro organisms grew in broth

Question 9

Robert brown

Answer 9

• 1833
• Microscopes with single lens
• Identified nucleus in cells and determined that it was important to cell theory

Question 10

M.J Schleiden (Plants), T.S. Schwann (animals), Rudolf Virchow

Answer 10

Microscope studies; Plant tissues, Animal tissue, diseased tissue
-Developed modern cell theory