Indian Card money collection

1
Class Topics
Title Biology 10/12/07
Objectives

• To assess knowledge gained about biochemistry.

• Indian Card money collection
• Move Desks
• Chapter 3 Test
• Notes Chapter 4
• If a man does not keep pace with his companions,
  perhaps it is because he hears a different
  drummer. Let him step to the music he hears,
  however measured or far away.
• Henry David Thoreau

• What do I need today?
• Book
• Assignment book
• Empty bladder
• Binder (including notes)

Saturday, November 21, 2009 522 PM
2
Class Assignments
By When
What

• Chapter 3 Test 10/12/07
• Read 69-72 10/15/07
• Chapter 3 Packet W.S. Science Skills 10/15/07
• All Chapter 3 Corrections 10/15/07
• Due this class period
• Due next class period
• Due in the future

3
Move Desks
4
Posttest Activities

• Hand in test
• DO NOT ASK TO GO TO THE BATHROOM!
• Choose from the following
• Read 69-72
• Correct homework
• Work on Ch 3 packet W.S. Science Skills

5
Scientists

• Robert Hooke (English, 1665)
• Looked at cork and named cells - after rooms in a
  monastery
• thought only plants had cells
• Anton van Leeuwenhoek (Dutch, 1674)
• First to use microscope to observe living cells
• Father of microbiology
• looked at pond water - animacules (little
  animals)
• ...I could exceedingly plainly perceive it to be
  all perforated and porous, much like a
  Honeycomb...these pores or cells , were not very
  deep, but consisted of a great many little
  boxes... Hooke describing his observations on a
  thin slice of cork.

6
Cell Theory

• Matthias Schleiden (1838)
• All plants are made of cells
• Theodore Schwann (1839)
• All animals are made of cells
• Rudolf Virchow (1858)
• All cells come from preexisting cells

7
Cell Theory

• All living things are composed of one or more
  cells.
• Cells are the basic units of structure and
  function in living things.
• All cells come from preexisting cells.

8
Cell SizeMath lab p. 56

• Most organisms have many small cells rather than
  fewer large ones
• Why?
• Surface area-to-volume ratio
• 61 good
• 31 very large for cells
• Any lower than this is very dangerous
• Allows transfer of materials in and out of cell
  easily
• Cell size small, SAVol high
• Cell size large, SAVol low

9
(No Transcript)
10
All cells have

• Cell membrane around outside
• Cytoplasm fluid of cell
• Cytoskeleton structure of cell
• Ribosomes make protein
• DNA used to make protein
• Some lose these after time due to specialization

11
Prokaryotes Bacteria

• Single celled organism
• Lacks nucleus and membrane bound organelles
• DNA in a circular loop
• Not chromosomes
• Cell wall
• An organelle is a structure within a cell that
  performs a specific function

12
Eukaryote
Prokaryote review

• Organism that has cells with nuclei and internal
  compartments (membrane bound organelles)
• ex. animals, fungi, plants, protists
• Internal membranes connect organelles
• Vesicles
• Small cavity to move materials around cell