Diversity-Oriented Synthesis (DOS): A Platform for Discovery in
Discovery and Diversity of...
Transcript of Discovery and Diversity of...
Discovery and Diversity of Cells
What is a Cell?
• A membrane-covered structures that contain all the materials necessary for life.
• Smallest building block of life
Robert Hook• First person to describe Cells
• 1665 he built a microscope and looked at cork
• saw tiny boxes and called them cells
• Cell is Latin for “tiny box”
Finding Cells in Other Organisms
Anton van Leeuwenhoek• 1st to see bacteria
• discovered yeast is a single-celled organism
Matthias Schleidenstudied plants and concluded that all
plants are made of cells.
Theodore Schwann studied animals and
concluded that all animals are
made of cells.
Rudolf VirchowA doctor who discovered
that cells formed only from other cells.
Cell Theory
• All organisms are made of one or more cells.
• The cell is the basic unit of all living things.
• All cells come from existing cells.
Types of Cells• Prokaryote – cells without a nucleus.
• All prokaryotes are single-celled with no membrane bound organelles.
• Circular DNA floats around cell.
• Eukaryote (you-karyote)– cells with a nucleus
• The Nucleus is where the DNA is stored
Two types of Prokaryotes• Eubacteria
• Most common bacteria.
• They live almost everywhere on Earth.
• Smaller than eukaryotic cells, no nucleus, circular DNA.
• Archaebacteria
• Not as common as Eubacteria.
• Live in harsh conditions like hot springs, salt water, & swamps.
• Unique because cell walls made up of material different than other cell walls.
Eukaryotic Cells• The largest cells. • Can be single-celled or multi-cellular.• All have a nucleus that contains the
DNA.• Most contain membrane-bound
organelles.• Most organisms that can be seen
without a microscope are made of eukaryotic cells.
• (plants, animals, fungi, . . .)