1. Cell Biology 1.1 Introduction to cells Flashcards
Who determined that all living things are composed of cells and that the cell is the basic unit of life? When?
Schleiden and Schwann in 1838
What did Schleiden and Schwann determine, and in what year?
1838: All living things are composed of cells and the cell is the basic unit of life.
Who determined that cells arise from pre-existing cells?
Virchow
What did Virchow determine?
Cells arise from pre-existing cells.
Who observed the cells of cork tree through a microscope? When?
Robert Hooke in 1655
What did Robert Hooke do? When?
He observed the cells of cork tree through a microscope in 1655.
Who discovered protoza and when?
Leewenhoek in 1674
Who discovered bacteria and when?
Leewenhoek in 1683
What did Leewenhoek discover? In what years?
Protoza: 1674
Bacteria: 1683
What are the 6 elements of life (basic chemical composition of all cells)
Carbon Oxygen Nitrogen Hydrogen Phosphorus Sulfur
What (element) based life form is being searched for?
Silicon
What does DNA stand for?
deoxyribonucleic acid
List 7 cell requirements
Absorb nutrients/take in materials Produce energy (usually ATP) Make molecules Grow in an organized manner Reproduce Respond to internal and external stimuli Be enclosed by a plasma membrane (gives it it's integrity)
What does ATP stand for?
Adenosine triphosphate
Why is ATP important?
Energy for cells.
What ration is important for cell size?
Surface area to volume
What theory describes the development of Eukaryotic cells from Prokaryotic cells?
Endoymbiotic theory
Describe the theory that describes the creation of prokaryotic cells from volcanoes
A rock that exploded to make Earth was really hot.
Volcanoes exploded.
Volcanoes make CO2, ash (S8, P4, and N2), and because of the greenhouse effect, condensation created oceans (H20), and those are the 6 elements of life.
Unicellular organism do what?
Carry out all functions of life within one cells.
What is a unicellular organism?
An organism consisting of only one cell.
