The Cell Theory

Question 1

What are the three parts of the cell theory?

Answer 1

• all organisms are composed of one or more cells
• the cell is the basic unit of structure and organisation in organisms
• all cells come from preexisting cells

Question 2

What is the more modern cell theory?

Answer 2

1) all known living things are made up of one or more cells
2) all living things come from preexisting cells
3) the cells is the fundamental unit of structure and function in all living things
4) The activity of an organism depends on the total activity of independent cells.
5) energy flow occurs within cells
6) heredity information (DNA) is passed on from cell to cell
7) all cells have the same basic chemical composition

Question 3

Who developed the first microscope and when?

Answer 3

Zachariah Jansen - early 1600’s

Question 4

What discovered bacteria and how?

Answer 4

Anton van Leeuwenhoek - made his own microscope

- initially called them animalcules

Question 5

Who discovered cells?

Answer 5

Robert Hooke

- discovered cells by looking at cork under microscope

Question 6

Who invented the cell theory and when?

Answer 6

1800’s
Schneider and Schwann
However they didn’t agree about where cells came from
Rudolf Virchow had information that proved they were formed from preexisting cells