Think about the 1 st 7slides then take notes on slides 8 &9 and do a quick illustration to help you remember (don’t worry about the exact dates. continue.

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Presentation transcript:

Think about the 1 st 7slides then take notes on slides 8 &9 and do a quick illustration to help you remember (don’t worry about the exact dates. continue reading to slide 14 and list 3 ways to tell a prokaryotic cell from a eukaryotic cell Test your self looking at slide 17, then check yourself by looking at slide 18 Draw & label a plant cell and an animal cell using slides 20 &20 Make a Venn diagram showing which organelles are found only in plant cells, only in animal cells, or in both plant and animal cells. Part 1

Who started the study of cells? What tools allow us to study cells? How are the polymers we studied used in cells? Which nutrient group carries out the majority of cell processes? How does a cell maintain homeostasis? How do cells make new and different cells? How do individual cells make a functioning organism? What happens when homeostasis is not maintained?

Robert Hooke, , English Chemist, Mathematician, Physicist, and Inventor

Matthais Schleiden (Plants) Theodor Schwann (Animals) Germany 1839: all organisms made of cells.

Rudolf Virchow (Germany 1858): all cells come from cells.

Anton van Leeuwenhoek, , Wine Assayer, Surveyor, Cloth Merchant, Minor Public Official, and Inventor 1st to see living things Cells are the basic units of life.

Write these notes Robert Hooke 1600s saw cells and named them cells because they looked like cells (rooms) in a monastery. Schleiden 1838 discovered all plants are made of cells. Schwann 1839 discovered all animals are made of cells Anton van Leeuwenhoek cells basic units of life Rudolf Virchow 1858 discovered all cells come from cells.

Modern Cell theory was formed based on the observations of these scientists and consists of 3 main parts. 1. Cells are basic unit of life. 2. All organisms are made of cells. 3. Cells come from cells

Light microscopes use 2 lenses to form a clear image. Due to diffraction of light waves they can only magnify objects about 1000 times(1millionth of a meter).

Electron Transmission Microscopes focus a beam of electrons allowing DNA or viruses to be visualized. Some can visualize structures 1 billionth of a meter in size. Organelles in a grain of pollen from tobacco plant appears flat

Electron Scanning Microscopes scan the surface of a specimen giving 3 dimensional images of the surface.

Drawing of prokaryote eukaryote How can you tell a prokaryote from an Eukaryotic cell? One micron is 1/1000 of a millimeter

characteristicprokaryoteeukaryote size 1um=1millionth of a meter Nucleus Specialized organelles surrounded by membranes Cell membrane Cytoplasm Number of cells

characteristicprokaryoteeukaryote size 1um=1millionth of a meter.1um-10um 10um-100um Nucleus noYes Specialized organelles surrounded by membranes noYes Cell membrane Yes Cytoplasm yesYes Number of cells 11 or more

DNA Is this cell Prokaryotic or Eukaryotic?

Which are prokaryotic, and which are eukaryotic?

eukaryotic prokaryotic eukaryotic prokaryotic

Artist rendition of A virus Electron scan of an HIV virus Viruses are Prokaryotic.

Plant Cell Nuclear envelope Ribosome (attached) Ribosome (free) Smooth endoplasmic reticulum Nucleus Rough endoplasmic reticulum Nucleolus Golgi apparatus Mitochondrian Cell wall Cell Membrane Chloroplast Vacuole Section 7-2 Figure 7-5 Plant and Animal Cells Go to Section:

Animal Cell

Are these prokaryotic or eukaryotic? Organelle: specialized internal structures in the cytoplasm of cells that carry out specific functions. (Division of labor) Like tiny organs.

Eukaryotic because prokaryotes don’t have lots of organelles. Organelle: specialized internal structures in the cytoplasm of cells that carry out specific functions. (Division of labor) Like tiny organs.

Plants and animals have a lot of organelles in common. Animal cell Both plant and animal cells Animal cellsPlant cells Venn Diagram Cytoplasm: fluid and organelles located between the Cell membrane and the nucleus. Organelle: specialized internal structures in the cytoplasm of cells that carry out specific functions. (Division of labor) Like tiny organs. Fill in the organelles where they belong.