Biology Cells as the Basis of Life: Cell Structure - Introduction to Cells

The video tutorial covers the cell theory, a fundamental concept in biology. It explains the three tenets: all living organisms are made of cells, cells are the basic unit of life, and all cells develop from pre-existing cells. The video uses examples like horses, cars, and algae to illustrate these principles. It also includes a scenario with Sally, a student struggling to study cell theory, and applies the theory to a real-life situation involving mold growth. The lesson concludes with a recap of the key points.

Why is Sally struggling with her cell theory test?

• She didn't attend any biology classes.

• She lost her biology textbook.

• She was sick during the lessons.

• She spent her time on social media instead of studying.

What does the first tenet of cell theory state?

• Cells are only found in animals.

• Cells are the basic unit of life.

• All living organisms are made of one or more cells.

• Cells can spontaneously generate.

How is a single cell similar to a cell phone?

• Both can function without all their parts.

• Both require all components to work properly.

• Both can generate energy on their own.

• Both are made of multiple cells.

What happens if a single-celled organism loses a component?

• It will become a multi-celled organism.

• It can still survive.

• It will grow a new component.

• It will die.

What is the third tenet of cell theory?

• All cells develop from pre-existing cells.

• Cells are the largest unit of life.

• Cells can appear out of nowhere.

• Cells are only found in plants.

How does the cell theory explain the growth of mold on a peach?

• Mold can spontaneously generate on fruit.

• Mold grows only in warm environments.

• Mold spores from the air develop into new cells.

• Mold is not made of cells.

Which of the following is NOT a tenet of cell theory?

• All living organisms are made of cells.

• All cells come from pre-existing cells.

• Cells can develop from non-living materials.

• Cells are the basic unit of life.