Cells: Intro to Cells Flashcards
Robert Hooke (1665)
published a book with photos of a cork as seen through a microscope
Who were the three people who created the cell theory?
Matthias Schleiden, Theodore Schwann, Rudolf Virchow
Matthias Schleiden (1838)
concluded that all plants are made of cells
Theodore Schwann (1839)
concluded that all animals are made of cells
Rudolf Virchow (1855)
concluded that all cells came from pre-existing cells
What did Janet Plowe do?
conclude that the cell membrane is a physical structure
What did Lynne Margoulis do?
created the endosymbiotic theory
What is the Endosymbiotic Theory?
states that eukaryotic cells came to be when prokaryotic cells formed symbiotic relationships with each other
What are the components that all cells have?
a cell membrane, genetic material, ribosomes, and cytoplasm
Prokaryote
a unicellular organism without nuclei and no membrane-bound organelles
Eukaryote
an organism with nuclei and membrane-bound organelles
Anaerobic prokaryotes
can switch between aerobic respiration, which uses oxygen, and fermentation
Anton van Leeuwenhook (1673)
perfected the simple microscope
Evidence of Endosymbiotic Theory
Evidence in support of theory focuses on mitochondria and chloroplasts:
- DNA is found
- Ribosomes present
- Binary fission occurs
- Inner membrane
Photosynthetic eukaryotes
evolved due to endosymbiosis between non-photosynthetic eukaryotic host cells and photosynthetic cyanobacterial or algal endosymbionts.
