Cell Theory and Its Pioneers

The video tutorial explains the widely accepted scientific fact that all animals are made of cells, a concept first proposed by Matthias Schleiden and Theodor Schwan in the mid-19th century. They observed that all living organisms are composed of one or more cells, leading to the development of cell theory. This theory has been confirmed by numerous studies and is now a fundamental principle of biology.

What is a widely accepted scientific fact about animals?

• All animals are made of molecules.

• All animals are made of tissues.

• All animals are made of atoms.

• All animals are made of cells.

Who were the scientists that first proposed the concept that all living organisms are composed of cells?

• Louis Pasteur and Robert Koch

• Matthias Schleiden and Theodor Schwan

• Isaac Newton and Albert Einstein

• Charles Darwin and Gregor Mendel

In which century was the cell theory proposed?

• 20th century

• 19th century

• 18th century

• 17th century

What has confirmed the cell theory as a fundamental principle of biology?

• One observation

• A single study

• Numerous studies

• A few experiments

What is the significance of the cell theory in biology?

• It is a minor concept.

• It is a controversial idea.

• It is a fundamental principle.

• It is an outdated theory.