Date: November 16, 2015 Aim #25: How are cells classified? HW: 1)Cheese Lab due Tomorrow Do Now:...
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Date: November 16, 2015 Aim #25: How are cells classified? HW: 1)Cheese Lab due Tomorrow Do Now : Warm-Up Notebook Date Title of Activity Page # 11/16 Viruses 46 Happy Birthd ay Dylan! !!
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Transcript of Date: November 16, 2015 Aim #25: How are cells classified? HW: 1)Cheese Lab due Tomorrow Do Now:...
Date: November 16, 2015Aim #25: How are cells classified?
HW:1)Cheese Lab due Tomorrow
Do Now: Warm-Up NotebookDate Title of Activity Page #11/16 Viruses 46
Happy Birthday Dylan!!!
Compare and contrast these two cars?
SIMPLE
COMPLEX
How do these cells compare?
SIMPLE
COM
PLEX
1) Cells are broken down into two main classes:
Cells
Prokaryotic Eukaryotic
Prokaryotes:Were probably the first life forms to appear on earth 3.5 billion years ago
Harsh Early Earth
What were the conditions on Earth at this time?1)Hot2)Little Oxygen3)Abundant Lightning4) Volcanic Activity
Miller and Urey in 1953
Steps:
1. Take molecules thought to be present in Earth’s early atmosphere:• Methane (CH4), ammonia (NH3), hydrogen (H2), and water H2O).
2. Run continuous electric current through the system: • this simulate lightening storms believed to be common on early earth
3. After one week: • 10-15 % of C was now in the form of organic compounds. • 2% of C had formed some amino acids.
4. Importance: • organic compounds like amino acids could be made easily under the conditions that
scientist believed to be present on early earth.
Why do you think Prokaryotes were the first life forms on earth?
1)Simple Structures
2)Their ability to tolerateharsh environments
3)Their ability to adaptto changing environments
Read as Class Endosymbiosis
ENDOSYMBIOTIC THEORY
TED- How we think cells evolved?
http://ed.ted.com/lessons/how-we-think-complex-cells-evolved-adam-jacobson
What are some features of prokaryotes?
1)Prokaryotes have NO NUCLEUS!!2) Have few organelles (mini-organs)3) PROKARYOTES = BACTERIA
** Although prokaryotesdo not have nuclei, theydo have DNA.
What organisms are made up of eukaryotic cells?
Plants Animals Fungi Protists
All these living things are made up of EukaryoticCells
What are some features of typical eukaryotic cells?
1) They are more complex
2) Appeared later on earth
3) They have nuclei
4) They are larger
5) Have more organelles
6) Have membrane boundorganelles
Cell Size and Scale
http://learn.genetics.utah.edu/content/cells/scale/
CELL TYPES• PROKARYOTIC• HAVE only a few
ORGANELLES• HAVE NO NUCLEUS• PRIMITIVE CELLS• Only Bacteria
• EUKARYOTIC• HAVE ORGANELLES• HAVE NUCLEUS• MODERN CELLS• All other living things:
animals, plants, fungi, protist (unicellular organisms)
ENDOSYMBIOTIC THEORY
Different Cell Types
How are they similar?
How are they different?
