Cell Theory and Cell Identification Quiz

Cell Theory Scientists

• The Cell Theory was postulated by Rudolf Virchow, Matthias Schleiden, and Theodor Schwann.
• These scientists collectively established the foundational concepts that all living things are composed of cells, and cells are the basic unit of life.

Basic Unit of Life

• The smallest and most basic unit of structure and function in organisms is a cell.

Prokaryotes vs. Eukaryotes

• Prokaryotes lack a nucleus and membrane-bound organelles, while eukaryotes possess both.
• Prokaryotic cells are generally smaller and simpler than eukaryotic cells.

Prokaryotic Cell Structure

• The outer boundary of a prokaryotic cell is called the cell wall.

Discovery of Cells

• Robert Hooke was the first scientist to see a cell and identify it, observing cork cells through a microscope in the 17th century.

Tenets of Cell Theory

• The three tenets of Cell Theory are:
  • All living things are made of cells.
  • Cells are the basic unit of life.
  • All cells arise from pre-existing cells.
• Any statement contrary to these points does not fit the Cell Theory.

Common Structural Features

• Common structural features of all cells typically include a plasma membrane, cytoplasm, and genetic material.
• Features not common to all cells might include specific organelles like chloroplasts or large central vacuoles, which are found primarily in plant cells.

Scientist's Contribution

• Robert Hooke is credited with the first record of seeing and identifying cells.