Mrs. Keadle JH Science Name____________________________________ period _____ date assigned_____________ date due ______________ date returned _____________ Spontaneous Generation and the Discovery of the Cell Using the information you read in “The Debate Over Spontaneous Generation” and “Discovery of the Cell and Mitosis”, answer the following questions, and create a historical timeline. 1 All of the following are characteristics of both living organisms and cells EXCEPT - A remove waste from themselves B being composed of complex cells C grow and die D extract energy from food 2 Ashley repeated Francisco Redi’s experiment for a spontaneous generation project. She placed meat in two identical jars. She placed a stopper in the top of one jar and left the other uncovered. After a few days, Ashley observed young flies (maggots) on the meat in the open jar. There were no flies in the sealed jar. What hypothesis was Ashley trying to test? F Decaying meat produces maggots G Maggots prefer one type of meat over another. H Maggots need a certain temperature to appear. J Plastic wrap keeps meat from spoiling. 2012 1 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science Which invention most influenced 3 Which of the following scientists 4 gave us a modern understanding the development of the cell of cell reproduction (mitosis)? theory? A Schleiden F centrifuge B Schwann G microscope C Virchow H thermometer J spring scale D All of the above Which factor contributed most to the 5 In all living things, the presence 6 of what structure supports the development of the cell theory? cell theory. F The discovery of many new species during the last century. A cell wall G The development of technology B cell membrane that can determine chemical composition C vacuole H The increase in knowledge about D chloroplast rates of evolution. J The improvement in microscopes over the last 200 years. 2 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science According to the cell theory, where did 7 Living things contain units of structure 9 and function that come from this cell come from? preexisting units. This statement best describes the - A another living cell energy from the sun A cell theory B a multicellular organism B lock-and-key model of enzyme C activity D the nonliving environment C concept of natural selection D heterotrophy hypothesis 8 Which statement represents an 10 What type of cell has membrane- exception to the cell theory? bound organelles? F All plants and animals are F eukaryotic cells composed of cells. G prokaryotic cells G Cells arise from preexisting cells by the process of mitosis. H both prokaryotic and eukaryotic neither prokaryotic or eukaryotic H Mitochondria and chloroplasts J contain genetic material and can replicate. J The specialization of cells enables an organism to function 3 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science 4 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science Create a timeline using the articles. You can cut out and paste each block in the correct location on the timeline. You will tape the two pages together to complete the timeline. 400 BC 0 1590 1665 – 1740 - 1832 1670 1770 5 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science 6 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science 1838 - 1860 - now 1930- 1953 1855 1890 1933 7 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science 8 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science Matthias Schleiden concluded Robert Hooke saw and described that all plant tissues are cells for the first time. composed of cells. Antony von Leeuwenhoek was Theodore Schwann concluded the first to describe protists and that all animal tissues were bacteria. made of cells. John Needham claimed that air had a life These statements were the force and could cause spontaneous beginning of the cell theory generation. Lazzaro Spallanzani disagreed and repeated Needham’s experiments but boiled the soup longer and used truly sealed conatianers. Zacharias Janssen creates the first compound microscope using lenses he created. Francis Crick, James Watson, Maurice Barthelemy Dumortier Wilkins and Rosalind Franklin observed the first evidence simultaneously discover and describe of cell division in plants. DNA for the first time. Francesco Redi challenged the idea of spontaneous generation using an experiment with meat in sealed and unsealed containers. 9 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science 10 Spontaneous Generation and the Discovery of the Cell Mrs. Keadle JH Science Leo Szilard, Ernst Rusk, and Max Knoll design and build the first electron Walter Flemming was the first microscope. This allows for much scientist to study mitosis and higher magnification and unlocks a new describe chromosomes. world in cell study Louis Pasteur ended the debate over spontaneous generation by using swan necked bottles that would allow in oxygen but not microbes in the air. The earliest descriptions Robert Remak was able to of spontaneous observe cell division in animal generation date back to cells. at least the time of Aristotle. Rudolf Virchow completed the cell theory by stating that all cells come from other cells. 11 Spontaneous Generation and the Discovery of the Cell .