The Discovery of Cells

The video tutorial covers the discovery of cells, highlighting key figures like Anton Van Leeuwenhoek and Robert Hooke. It explains the history and principles of cell theory, including the contributions of Matthias Schleiden and Theodore Schwann. The tutorial also discusses different types of microscopes, such as light and electron microscopes, and introduces the two basic cell types: prokaryotes and eukaryotes.

Who is credited with inventing the microscope?

• Matthias Schleiden

• Anton Van Leeuwenhoek

• Robert Hooke

• Theodore Schwann

Which scientist first observed cells in cork?

• Theodore Schwann

• Matthias Schleiden

• Robert Hooke

• Anton Van Leeuwenhoek

What did Matthias Schleiden conclude about plants?

• They are made of molecules

• They are composed of fibers

• They are composed of cells

• They are made of tissues

What is the first main idea of the cell theory?

• Cells are the basic unit of life

• All living things are composed of one or more cells

• Cells come from pre-existing cells

• Cells are microscopic

What is the basic unit of organization in organisms according to the cell theory?

• Cells

• Tissues

• Organs

• Molecules

Which type of microscope uses a beam of electrons?

• Scanning microscope

• Electron microscope

• Simple light microscope

• Compound light microscope

What is the maximum magnification of a light microscope?

• 500 times

• 50,000 times

• 1,500 times

• 5,000 times

Which type of electron microscope allows you to see the inside structures of a cell?

• Scanning electron microscope

• Transmission electron microscope

• Simple electron microscope

• Compound electron microscope

What is a key characteristic of prokaryotic cells?

• They have a nucleus

• They lack internal membrane-bound structures

• They have multiple organelles

• They are larger than eukaryotic cells

Who first observed the nucleus in cells?

• Robert Hooke

• Theodore Schwann

• Rudolf Virchow

• Robert Brown