Aim #22: How are cells classified?

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Aim #22: How are cells classified? Date: November 1, 2016 Aim #22: How are cells classified? HW: Castle Learning due Thursday Lab #’s 1-7????? Due Friday!!! Quarterly Exam Thursday 11/3 (period 1), Friday 11/4 (period 5) Do Now: Answer the following based on your knowledge of viruses: Are viruses living? Support your answer. Are viruses smaller or larger than bacterial cells? How are viruses and bacteria similar? What instrument is needed to see a virus?

Compare and contrast these two cars? SIMPLE COMPLEX

How do these cells compare? SIMPLE COMPLEX

1) Cells are broken down into two main classes: Prokaryotic Eukaryotic

2) Which types of cells were the first to appear on Earth? Prokaryotes were probably the first life forms to appear on earth 3.5 billion years ago 3) What were the conditions on Earth at this time? Hot Little Oxygen Abundant Lightning 4) Volcanic Activity Harsh Early Earth

Miller and Urey in 1953

4) Why do scientists think Prokaryotes were the first life forms on earth? Simple Structures Their ability to tolerate harsh environments Their ability to adapt to changing environments

TED- How we think cells evolved? http://ed.ted.com/lessons/how-we-think-complex-cells-evolved-adam-jacobson

5) What are some features of prokaryotes? ** Although prokaryotes do not have nuclei, they do have DNA. Prokaryotes have NO NUCLEUS!! Have few organelles (mini-organs) PROKARYOTES = BACTERIA

6) What organisms are made up of eukaryotic cells? Plants Animals Fungi Protists All these living things are made up of Eukaryotic Cells

7) 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 bound organelles

Cell Size and Scale http://learn.genetics.utah.edu/content/cells/scale/

CELL TYPES (Review) EUKARYOTIC PROKARYOTIC HAVE ORGANELLES HAVE NUCLEUS MODERN CELLS All other living things: animals, plants, fungi, protist (unicellular organisms) PROKARYOTIC HAVE only a few ORGANELLES HAVE NO NUCLEUS PRIMITIVE CELLS Only Bacteria

ENDOSYMBIOTIC THEORY

8) Different Cell Types How are they similar? How are they different?