Unit 3a 3.1 3.2 3.3 Flashcards
What is a theory
A theory is a proposed explanation for a wider range of observations and experimental results/ supported by a lot of evidence
What invention enabled the discovery of cells
Microscope
Who coined the term cell
Robert Hooke
Who published the first statement of the cell theory
Theador Schwann
what was incorrect about the first version of the cell theory
Spontaneous generation is false
who first realized that cells only come from preexisting cells
Rudolph Virchow
Three parts of cell theory
1.) All living things are composed of cells
2.) cells are the basic units of structure and function for living things
3.)All cells come from preexisting cells
List the two broad categories of living things
1.) Prokaryotic 2.) Eukaryotic
Contrast the way in which DNA is stored in the two types of cells.
Eukaryotic- DNA enclosed in the nucleus Pro- DNA is suspended from the cyptoplasm
Which type is more basic
pro
Which is smaller in size
Pro
Which is always Unicellular
Pro
Which can be unicellular or multicellular
Eukaryotic
Which two general types of organisms are prokaryotic
Bacteria Archea
4 categories of eukaryotes
animals, plants protist, fungi
Which of the two types does not contain many specialized organelles?
Prokaryotic
What typically surrounds prokaryotic cells?
cell wall
List two general functions of the cytoskeleton
Maintains cell shape, Hold organelles in place
What is the main component of the cytoskeleton?
Protein
What is the largest type of fiber in the cytoskeleton
Microtube
What is the smallest type of fiber in the Cytoskeleton
Microfilaments