Cell Theory Flashcards
What are the 3 POSTULATES of the cell theory?
- All organisms are composed of one or more cells.
- The cell is the smallest basic unit of structure and organization in organisms.
- All cells come from pre-existing cells.
What is the basic and functional unit of life?
cell
How many cells are there in the human body?
30 trillion (Cafasso 2018)
How many cells are there in the dot of “i”?
50
What does the SPONTANEOUS GENERATION THEORY state?
living things come from non-living things
Who disproved the SG theory?
- Francesco Redi
- Lazzaro Spallanzani
- Louis Pasteur
Who approved the SG theory?
John Needham
How did Francesco Redi disprove the SG theory?
put fresh meat in an open jar and a closed jar, found maggots in the open one
How did John Needham approve the SG theory?
put heated broth into a bottle and found microorganisms that “came from nothing”
How did Lazzaro Spallanzani disprove the SG theory?
put boiled broth into an open bottle and a closed bottle, found microorganisms in the open one
How did Louis Pasteur disprove the SG theory?
put boiled broth in a swan-like tube, tilted the tube and found dust and life
Who was involved in the discovery of the cell?
- Zacharias Janssen
- Robert Hooke
- Anton von Leeuwenhoek
- Robert Brown
- Matthias Jacob Schleiden
- Theodor Schwann
- Rudolf Virchow
What did Zacharias Janssen do?
invented the first compound microscope
What did Robert Hooke do?
observed a cork’s cell wall, coined the word “cell”
What did Anton von Leeuwenhoek do?
devised first light microscope, called bacterial microorganisms “animalcules”
