Stem 11

The basic unit of life. All living things are made up of one or more cells.

Unicellular organisms belonging to the prokaryotic group where the organisms lack a few organelles and a true nucleus.

An instrument used to view objects that cannot be seen by the unaided eye. It can be magnifying the size of very small object.

• Microscope

• Microscopic

• Unicellular

• Cellular

Invented a primitive microscope with the help of his father, Hans. This microscope would later be used by Marcello Malpighi and Robert Hooke.

Conducted separated investigations on plant cells. They determined the presence of the organelles within its cells.

• ZACHARIAS JANSSEN

• ROBERT HOOKE

• ANTON VAN

  LEEUWENHOEK

• MARCELLO MALPIGHI & NEHEMIAH GREW

He viewed a thin slice of cork where he found hollow, small structures which reminded him of cellulae used by monks. He called these structures, "cells."

• Robert Hooke

• Anton Van Leuwenhook

• Esthainian

• Marcelo Malpghi

Examined plants and recognized that plant parts come from cells. In his writings in Contributions to Phytogenesis, he proposed that the different structures of a plant are all composed of cells.

• MATTHIAS SCHLEIDEN

• ROBERT BROWN

• THEODOR SCHWANN

• ALBRECHT VON ROELLIKER

He develops fermentation, a process to kill bacteria, he proved that bacteria are able to multiply and that bacteria's cells come from other bacterial cells.

• LOUIS PASTEUR

• MARCELLO MALPIGHI

• & NEHEMIAH GREW

• Rudolf Virchow

Single-celled organisms classified as eukaryotes (organisms whose cells contain membrane-bound organelles and nuclei). Other eukaryotes include: Protozoa are found everywhere.

Are microscopic, which means they are so small that you cannot see them with unaided eyes.