31724877
Description
Mind Map by Jhulan Mukherjee, updated more than 1 year ago
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Created by Jhulan Mukherjee
over 3 years ago
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cell
- Robert Hooke discovered cell.He
saw tiny honeycomb like structures
in a slice of cork in 1665.He published
Micrographia.
- Leeuwenhoek
discovered free living
cells in pond water in 1674.
- Purkinje coined the
word protoplasm for
fluid part of cell in
1839.
- Huxley called protoplasm
the physical basis of life in
1868.
- Schleiden [1838] and
Schwann [1839] proposed the
cell theory.
- Rudolf Virchow expanded
cell theory saying that all
cells arise from pre
existing cells in 1855.
- unicellular organisms are
bacteria,chlamydomonas,amoeba
and paramecium,etc. [single
celled].
- Multicellular organisms are bread
mould,penicillium,aspergillus,etc.
- Compound microscope
was invented by Z Janssen.
- Electron microscope
was discovered by
Knoll and Ruska
- Electron microscope uses
electromagnets instead of
glass lens for magnification
and electrons instead of visible
light for illumination.
- a cell is able to perform
because of cell organelles. Cell
is able to perform all basic
functions of life
- cell contains cell
membrane,nucleus,cytoplasm.
- nucleus+cytoplasm=protoplasm
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