The Cell: Part 1: The Cell Theory

Question 1

17th Century

Answer 1

Anton Van Leeuwenhoek (Holland)- lenses he crafted- was the first to document and observe a living cell.

Question 2

`1665

Answer 2

Robert Hooke- a microscope he developed- Coined the term Cell after observing a cork tissue.

Question 3

1838

Answer 3

Matthias Schleiden- newly developed microscopes- concluded that all plants are made of cells- German botanist.

Question 4

1839

Answer 4

Theodor Schwann- stated that all animals are made of cells.

Question 5

1855

Answer 5

Rudolf Virchow- a pathologist studying cell reproduction- stated ‘‘where a cell exists, there must be a preexisting cell.

Question 6

What does the Cell Theory state?

Answer 6

• All living things are composed of cells.
• Cells are the basic units of all organisms.
• All cells arise from pre-existing cells.

Question 7

What is the diameter of the Animal and Plant cells?

Answer 7

Most plants and animal cells have a diameter between 10-100 micrometers.

Question 8

What is an example of a cell that is smaller than a diameter of 10 micrometers?

Answer 8

A red blood cell. It has a diameter of 8 micrometers.

Question 9

All cells ………………..

Answer 9

are enclosed by a membrane that regulates the passage of material between the cell and its surroundings. They also contain a nucleic acid that directs the cell’s activities and controls inheritance.