Biology

Cards (24)

  • Organism is a contagious living system such as an animal, plant, fungus, protist, archaeon, or bacterium
  • A Unicellular is an organism that consists of one cell.
  • A multicellular organism is made up of many cells
  • A Microscopic Organism cannot be seen by the human eye without the use of microscope.
    Ex. euglena
  • A Macroscopic Organism can be seen by the human eye.
    Ex. multicellular organism like animals
  • A Microscope is an instrument used to magnify a tiny object.
  • The Romans discovered the first lens.
  • Lens was derived from the latin word lentil – as it represents the shape of a lentil bean.
  • Zacharias Janseen made the first compound microscope.
  • Robert Hook is known to built his own microscope. He used thin slices of cork as a specimen in his microscope.
  • Cellula means small compartment. It eventually became the word “cell”.
  • Micrographia is one of the first detailed handbook on microscopy and imaging.
  • Anton Van Leeuwenhoek is a scientist who studied the bacteria, blood cell, and protist.
  • Matthias Jakob Schleiden, a professor of botany in Germany. He stated that all plants are composed of cells.
  • Theodor Schwann is a professor of physiology at the University of Belgium. He studied several slides of animal tissues in which he stated that animals are composed of cells.
  • All organisms are made up of cells.
  • The basic unit of life is cell.
  • All cells come from pre-existing cells
  • Rudolf Ludwig Karl Virchow, postulated the Idea of Omnis cellula e cellula (All cells come from cells)
  • Theory of Spontaneous Generation states that organisms came from non-living things
  • Francesco Redi
    • Disproved the theory that maggots could be spontaneously generated from meat using a controlled experiment
  • John Needham
    • Believed that life can arise spontaneously
    • Repeated Redi's experiment but yielded different result because he was not successful in killing all microbes while boiling broth
  • Lazzaro Spallanzani
    • Disagreed to the theory of spontaneous generation after observing absence of small organisms in some chicken broth placed in sealed flasks heated for 30 minutes
  • Louis Pasteur
    • Disproved spontaneous generation through an experiment where beef broth was sterilized through boiling in two flasks, one that was exposed to air and another that was protected from it