GenBio 1 Q1

First postulate of the cell theory

The cell is the basic unit of life

Second postulate of the cell theory

All living organisms are comprised of cells

Third postulate of the cell theory

New cells are created from preexisting cells

Dutch man who made a primitive microscope

Zacharias Janssen

Observed a thin piece of cork and found hollow structures

Robert Hooke

Italian scientist and english botanist who determined presence of organelles in cells

Marcello Malphigi, Nehemiah Grew

Upgraded Janssen’s microscope and found cells observing pond scum

Anton van Leeuwenhoek

Scottish botanist that made a series of discoveries about cell organelles and discovered the nucleus

Robert Brown

Recognized that plant parts came from cells

Matthias Schleiden

Declared that animals are made of cells and put an end to the debate of whether or not plants and animals are different in cell structure

Theodor Schwann

Swiss embryologist that stated that egg and sperm are made of cells and initiated the idea that most living beings are made of cells.

Albrecht von Roelliker

French microbiologist that, while developing fermentation, discovered that bacteria cells come from other cells

Louis Pasteur

Declared that cells come from preexisting cells

Rudolf Virchow

First postulate of the modern cell theory

The cell contains DNA passed on from cell to cell

Second postulate of the modern cell theory

All cells are basically the same in chemical composition and metabolic function

Third postulate of the modern cell theory

All basic chemical and physiological functions are carried out inside the cell

Fourth postulate of the modern cell theory

Cell activity depends on the activities of sub-cellular structures inside the cell