Review…Review…

Hypotonic Solution: more solute Hypotonic Solution: more solute _______ the cell_______ the cell

What happens to the cell?What happens to the cell? Hypertonic Solution: More solute Hypertonic Solution: More solute

_______ the cell_______ the cell What happens to the cell?What happens to the cell?

PRO vs. EUKPRO vs. EUK

Differences?Differences? Bacteria are….Bacteria are…. Plant and Animal are…Plant and Animal are… Who discovered Cells?Who discovered Cells?

Bacteria/VirusBacteria/Virus

Are viruses living or non-living?Are viruses living or non-living? Are Bacteria living or non-living?Are Bacteria living or non-living? Are Bacteria larger or smaller than Are Bacteria larger or smaller than

viruses?viruses?

Bacteria CellBacteria Cell

Cell Theory & Cell Theory & EndosymbiosisEndosymbiosis

The CellThe Cell

First discovered by Robert Hooke in First discovered by Robert Hooke in 16651665

Pieces of cork – he actually saw the Pieces of cork – he actually saw the cell walls of the plant cellscell walls of the plant cells

Cell TheoryCell Theory

1.1. All living organisms are composed of All living organisms are composed of 1 or more cells.1 or more cells.

2.2. Cells are the basic unit of structure Cells are the basic unit of structure and organization of all living and organization of all living organisms.organisms.

3.3. Cells arise only from previously Cells arise only from previously existing cells, with cells passing existing cells, with cells passing copies of their genetic material on to copies of their genetic material on to their daughter cells.their daughter cells.

Endosymbiont TheoryEndosymbiont Theory This theory says that certain This theory says that certain

unicellular organisms engulfed other unicellular organisms engulfed other cells. These engulfed cells become cells. These engulfed cells become organelles in the host cell. organelles in the host cell.

Lead to the diversity of Protist (Plant-Lead to the diversity of Protist (Plant-like, Animal-like, Fungus-like)like, Animal-like, Fungus-like)

First proposed in the 1960’s by Lynn First proposed in the 1960’s by Lynn MargulisMargulis

Evidence of EndosymbiosisEvidence of Endosymbiosis

Pg. 576Pg. 576

The first Eukaryotes acquired The first Eukaryotes acquired mitochondria & chloroplast by mitochondria & chloroplast by engulfing a prokaryoteengulfing a prokaryote

Mitochondria & chloroplast have their Mitochondria & chloroplast have their own DNA & ribosomes b/c they were own DNA & ribosomes b/c they were once Prokaryotic cells.once Prokaryotic cells.