cell notes Flashcards
Robert Hooke
used compound cork microscope -1665-view cork cells with prepared slides
The cell
The fundamental unit of life. it is the smallest structure of a multicellular organism Capable of performing the processes of life.
Anthony van Leeuwenhoek
-1670-ground his own Lenses so were better than compound scopes of that time -observed protests, sperm, worms
botanist Robert Brown
1833_ identified and named nucleus in all plant cells
schleiden (plant cells 1838) Schwann (animal cells 1839)
suggested that cells are the basic units of all living things
Virchow 1858
observed cells dividing. these discoveries resulted in the cell theory.m
cell theory
a. all organisms are composed of on or more cells ( unit of structure)
b. cells are the basic units of function of all organisms
c. all cells are made of pre-existing ones
what do cells contain?
DNA that is passed from cell to cell during cell division.
when does energy flow occur (matabrolism)
occurs within the cells. most cell activities take place at cell level. these include protein synthesis, getting energy from food, replication, ect.
all cells are basically
the same in chemical composition in organisms of similar species.