The Cell Theory

These flashcards cover the essential concepts and facts about the Cell Theory and key historical contributions to the understanding of cells.

What did Robert Hooke observe that led him to name them cells?

He observed small boxes in cork tissue that reminded him of monk's rooms in monasteries.

What term did Anton van Leeuwenhoek use to describe bacteria?

He called them 'animalcules,' meaning 'little animals.'

What did Matthias Schleiden conclude about plants in 1838?

He concluded that all plants are made of cells.

What was Theodor Schwann's conclusion about animals in 1839?

He concluded that all animals are made of cells.

What principle did Rudolph Virchow contribute in 1855?

He concluded that all cells come from pre-existing cells.

What are the three original tenets of the Cell Theory?

1. All living things are composed of one or more cells. 2. The cell is the basic unit of structure and function in living things. 3. Cells are produced by the division of pre-existing cells.

What addition to the Current Cell Theory states that metabolism occurs in cells?

Metabolism is the collection of reactions that occur within cells of an organism.

What is the significance of DNA in cell reproduction?

Hereditary information (DNA) must be copied so that each new cell has its own genetic material.

What do both prokaryotic and eukaryotic cells have in common?

They both have a cell membrane, cytoplasm, ribosomes, and DNA.