1. Cell Functions 1.5, 3.2, 1.6, 3.3 (10.1 HL)

2. 1.5 Origins of cells How do we know where cells come from?

3. Verifying the theory… Theophrastus Spontaneous generation Greek Aristotle Formation of insects Greek Paracelsus Spontaneous formation of mice 16 th Century

4. Francisco Redi Maggots developed from flies. 17 th century Lazzaro Spallanzani Early microbe exp. 17 th century Louis Pasteur Swan flask exp. 1862 http://bcs.whfreeman.com/thelifewire/content/chp03/030200 3.html Online activity explaining Pasteurs’ swan flask experiments.

5. https://www.youtube.com/watch?v =H2_6cqa2cP4

6. Research task Each group will answer a different question and present their answers to the class in a ‘FUN’ and engaging way. Each group should also have electronic notes which can be added to moodle and shared with the class.

7. Questions… (assuming life developed on Earth and not from space…) 1.What would the Earth have been like 4.6 billion years ago? 2.When & how did prokaryotes develop? 3.When & how did eukaryotes develop? (endosymbiosis) 4.What is the significance of Bangiomorpha pubescens? 5.How does the work by Stanley Miller & Harold Urey help to explain the origin of cells? 6. Is it possible to artificially synthesise a life form? Work of Dr. Craig Venter 2010. 7.Is there any evidence that evolution will one day cease, if not can we predict the future from past events?