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Home , Cell theory, Louis Pasteur

Mrs. Keadle JH

Name______period _____ date assigned______date due ______date returned ______Spontaneous Generation and the Discovery of the

Using the information you read in “The Debate Over ” and “Discovery of the Cell and ”, answer the following questions, and create a historical timeline.

1 All of the following are characteristics of both living and cells EXCEPT -

A remove waste from themselves

B being composed of complex cells C grow and die D extract from

2 Ashley repeated Francisco Redi’s 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 (mitosis)? ?

A Schleiden F centrifuge

B Schwann G

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 supports the development of the cell theory? cell theory.

F The discovery of many new species during the last century. A G The development of technology B that can determine chemical composition C vacuole H The increase in knowledge about D chloroplast rates of .

J The improvement in 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 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 B lock-and-key model of C activity D the nonliving environment C concept of

D heterotrophy hypothesis

8 Which statement represents an 10 What type of cell has membrane- exception to the cell theory? bound ?

F All and 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 saw and described that all tissues are cells for the first time. composed of cells.

Antony von Leeuwenhoek was Theodore Schwann concluded the first to describe and that all tissues were . . made of cells. John Needham claimed that air had a These statements were the force and could cause spontaneous beginning of the cell theory generation. disagreed and repeated Needham’s but boiled the soup longer and used truly sealed conatianers.

Zacharias Janssen creates the first compound microscope using lenses he created.

Francis Crick, , Maurice Barthelemy Dumortier Wilkins and 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 was able to of spontaneous observe cell division in animal generation date back to cells. at least the time of . completed the cell theory by stating that all cells come from other cells.

11 Spontaneous Generation and the Discovery of the Cell