cell functions 1.5, 3.2, 1.6, 3.3 (10.1 hl). 1.5 origins of cells how do we know where cells come...

Cell Function s 1.5, 3.2, 1.6, 3.3 (10.1 HL)

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Cell Functions

1.5, 3.2, 1.6, 3.3 (10.1 HL)

1.5 Origins of cells

How do we know where cells come from?

Verifying the theory…

TheophrastusSpontaneous generation

GreekAristotle

Formation of insectsGreek Paracelsus

Spontaneous formation of mice

16th Century

Page 4: Cell Functions 1.5, 3.2, 1.6, 3.3 (10.1 HL). 1.5 Origins of cells How do we know where cells come from?

Francisco RediMaggots developed

from flies.17th century

Lazzaro SpallanzaniEarly microbe exp.

17th centuryLouis Pasteur

Swan flask exp.1862http://bcs.whfreeman.com/thelifewire/content/chp0

3/0302003.htmlOnline activity explaining Pasteurs’ swan flask experiments.

http://bcs.whfreeman.com/thelifewire/content/chp03/0302003.html

Page 5: Cell Functions 1.5, 3.2, 1.6, 3.3 (10.1 HL). 1.5 Origins of cells How do we know where cells come from?

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

H2_6cqa2cP4

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

Page 6: Cell Functions 1.5, 3.2, 1.6, 3.3 (10.1 HL). 1.5 Origins of cells How do we know where cells come from?

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.

Page 7: Cell Functions 1.5, 3.2, 1.6, 3.3 (10.1 HL). 1.5 Origins of cells How do we know where cells come from?

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?

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