Lesson 2: Cell Theory

Question 1

discovered that the combination of two lenses in a particular arrangement was the secret to better visualization and magnification of objects

Answer 1

Hans Janssen and his son, Zacharias Jansenn

what they invented became the prototype for the compound microscope

Question 2

One of his greatest discoveries was the cell which looked like a small monastery room, hence the name.

Answer 2

Robert Hooke

Question 2

Robert Hooke is widely recognized as the

Answer 2

English Father of Microscopy

he pioneered in microscopic research

Question 2

• a Dutch maker of microscopes, was the first person to see live cells in 1665
• his invention paved the way for the development of the world’s first practical microscope

Answer 2

Antonie van Leewenhoek

Question 2

what did Antonie van Leeuwenhoek discover?

Answer 2

single-celled organisms which he called animalcules

discovery of protozoa, RBC, capillary systems

Question 2

who discovered the two infectious bacteria, tubercle and cholera bacilli?

Answer 2

Robert Koch

Question 3

use electrostatic and electromagnetic lenses in forming the image by controlling the electron beam to focus it at a specific plane with reference to the specimen

Answer 3

electron microscopes

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uses beams of accelerated electrons as a source of illumination

Question 3

German botanist who discovered all plants are composed of cells

Answer 3

Matthias Schleiden

Question 4

discovered that all animals are also made up of cells

Answer 4

Theodor Schwann

Question 4

discovered all cells came from pre-existing cells after he worked on how diseases affect living organisms

Answer 4

Rudolf Virchow

Question 5

Three tenets of the Cell Theory:

Answer 5

1. all living organisms are made up of one or more cells
2. cells comprise the smallest functional unit of life
3. cells come only from pre-exisiting cells