unit 3 Flashcards
what do red blood cells carry
oxygen
define theory
a hypothesis that’s been tested lots of times and hasn’t been proven wrong
what was the spontaneous generation theory
living things come from nonliving things
who disproved the spontaneous generation theory through the magot experiment
Francesco Redi
who disproved the spontaneous generation through the flask theory
Louis pasture
what did robert hooke do
first to discover cell through cork in 1665 (tiny boxes)
anton van leeuwenhook
first to discover living organisms through pond scum and claimed cells are in plants and animals 1673
schlieden and schwann
schliden said plants are made of cells, schwann said all animals were made of cells 1838-1839
rudolf virchow
cells are made from pre existing cells 1858
traditional cell theory
-all organisms are mad of cells AND cells come from other cells
-cells are the basic unit of life
-cells have specialized structures and functions that are necessary for life
modern cell theory
-energy flow occurs within cells
-cells contain DNA that is passed along during division
-all cells are similar in chemical composition
what does a compound light microscope do
uses light and a series of lenses to magnify
what does a transmission electron microscope do
shoots electrons through the object
what does a scanning tunneling microscope do
shows atoms on object’s surface
who developed the first microscope
hans and zacharios janssen
