Origin of Life
What does the term "panspermia" mean?
The theory that "seeds of life" exist throughout the universe and can propagate through space.
Which scientist used a swan-neck flask to disprove spontaneous generation?
Louis Pasteur
Name one of the three main principles of cell theory.
Who coined the term 'cell'?
Robert Hooke
Which type of cell lacks a nucleus?
Prokaryotic cells
Name the theory that life was carried to Earth via meteorites or asteroids.
Extraterrestrial Origin
What did Francesco Redi use in his experiment to challenge spontaneous generation?
Decaying meat in jars.
Who proposed that 'all living cells come from pre-existing cells'?
Rudolph Virchow
Which scientist discovered the nucleus while studying orchids?
Robert Brown
Name one structural difference between prokaryotic and eukaryotic cells.
Eukaryotic cells have a nucleus.
Which theory suggests life arose from inanimate matter?
Abiogenesis or Spontaneous Generation.
Which Scientist/experiment falsely supported spontaneous generation?
John Needham's experiment
Which scientists contributed to the cell theory "all living things (both plants and animals) are composed of cells"?
Matthias Jakob Schleiden (plants) and Theodor Schwann (animals)
Who first observed single-celled organisms and called them 'animalcules'?
Anton van Leeuwenhoek
What is the powerhouse of the cell?
Mitochondria
Which theory suggests life originated from divine intervention?
The theory of Divine Creation.
Which scientist’s experiment with boiled broth in sealed flasks disproved Needham’s findings?
Lazzaro Spallanzani
What does "cell is the basic structural and functional unit of living things" mean in cell theory?
It means all the processes of life occur within cells, making them the smallest functional units of life.
Who produced the first compound microscope?
Hans and Zacharias Janssen
What organelle is present in plant cells but not in animal cells and is responsible for photosynthesis?
Chloroplast
What is the significance of cyanobacteria in Earth's history?
Cyanobacteria were among the first organisms to perform photosynthesis, contributing to the oxygenation of Earth's atmosphere.
What is the primary difference between Needham’s and Pasteur’s experiments?
Pasteur used a swan-neck flask to prevent microbial contamination while allowing air, disproving spontaneous generation conclusively.
Which part of cell theory contradicts the idea of spontaneous generation?
The principle that all cells arise from pre-existing cells.
Which scientist’s observations led to the discovery of red blood cells?
Anton van Leeuwenhoek
Name two structural differences between plant and animal cells.
Plant cells have a cell wall and chloroplasts, while animal cells do not. Animal cells have centrioles, which are typically absent in most plant cells.