9TH GRADE BIOLOGY (Mr. Duane's Class)
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April 08, 2010

SUA SPONTE

Week #3  Sept 17th - 19th:

 

 

 

 

 

 

 

 

 

Day #1: Lab Activity: Comparing Prokaryotic & Eukaryotic Cells

Record in Lab Notebooks

bulletDiagrams of eukaryotic cells under low, medium, and high powers.   Label structures
bulletSize estimations of eukaryotic cells
bulletDiagrams of prokaryotic cells under low, medium, and high powers.   Label structures
bulletSize estimations of prokaryotic cells

Documents

bullet Procedure: Comparing Prokaryotic & Eukaryotic Cells
bullet Hw Questions: Comparing Prokaryotic & Eukaryotic Cells (due Mon)

 

Day #2: Lab Activity: Comparing Plant (Onion) & Animal (Human Cheek) Cells

Record in Lab Notebooks

bulletDiagrams under low, medium, and high power of onion cells
bulletDiagrams under low, medium, and high power of human cheek cells
bulletWritten observations of plant and animal cells
bulletSize Estimations of Onion Cells & Cheek Cells

Documents

bullet Procedure: Comparing Plant & Animal Cells
bullet Hw Questions: Comparing Plant & Animal Cells (due on Monday)
bullet Lab Report Guidelines: Comparison of Plant & Animal Cells (rough draft due Wed)

 

 

 

COMPARING CELLS 1: PROKARYOTES vs. EUKARYOTES

 

INTRODUCTION

In this lab, students use microscopes to compare and contrast prokaryotic cells (bacteria) and eukaryotic cells (Protists).

 

OBJECTIVES:  

By the end of this exercise, you should be able to...

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explain how the cell is the basic unit for all living things.

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relate characteristics of living things to cell structure.

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diagram prepared slides of prokaryotic cells (bacteria) and label the cell wall, cell membrane, and cytoplasm.  Identify the shape of the species of bacteria.

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 measure the length and width of bacteria cells in micrometers.

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 diagram eukaryotic cells (Protists) and label the cell membrane, cytoplasm, nucleus, and any other organelles that are visible.

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measure the diameter of Protist cells in micrometers.

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compare and contrast Prokaryotic (bacteria) cells with eukaryotic (Protist) cells.

 

PROCEDURE PART A: EUKARYOTIC CELLS (PROTISTS)

  1. Acquire a prepared slide from the box labeled "Single Celled Eukaryotes (Protists)".
  2. Label the species of Protist in your lab notebook.
  3. Focus the slide under the low power objective and move the slide to find good examples of these cells.  Diagram the cells in your lab notebook.  Label the cell membrane, cytoplasm,  nucleus, and any other organelles that are visible.
  4. Focus under medium power and diagram.
  5. Focus under high power and diagram.
  6. Estimate the size (length, width, diameter) of a single cell.  You may choose to estimate the size under any power objective.

 

PROCEDURE PART B: PROKARYOTIC CELLS (BACTERIA)

  1. Acquire a prepared slide from the box labeled "Single Celled Prokaryotes (Bacteria)".
  2. Label the species of Bacteria in your lab notebook.
  3. Focus the slide under the low power objective and move the slide to find good examples of these cells.  Diagram the cells in your lab notebook. 
  4. Focus under medium power and diagram.
  5. Focus under high power and diagram.  Label the cell membrane, (cell wall), and  cytoplasm. 
  6. Estimate the size (length, width, diameter) of a single cell.  You may choose to estimate the size under any power objective.

 

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Questions: Prokaryotic and Eukaryotic Cells

 

Answer the following questions and statements using complete sentences.

 

1.      Explain the function of the nucleus in eukaryotic cells and tell how prokaryotic cells carry out this function.

2.      What structures do both prokaryotic and eukaryotic cells have?

3.      What structures (organelles) do eukaryotic cells have that prokaryotic cells do not?

4.      Compare the size and shape of both eukaryotic cells and prokaryotic cells.

5.      Give examples of single celled organisms that are prokaryotic.

6.      Give examples of single celled organisms that are eukaryotic.

 

Diagrams

In the Column 1, diagram a single bacterium (prokaryotic cell).  Be sure to tell the total magnification, identify the cell, label the cell wall and cytoplasm, and indicate the size of the cell.

In Column 2, diagram a single celled Protist (eukaryotic cell).  Be sure to tell the total magnification, identify the cell, label the cell membrane, cytoplasm, nucleus, and other organelles, and indicate the size of the cell.

 

1. Bacterium (Prokaryotic cell)

2. Protist (Eukaryotic cell)

Magnification:

Magnification:

Object:

Object:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data: Size Estimations of Prokaryotic & Eukaryotic Cells