7.1 The History of the Cell Theory
The invention of microscopes grant it possible for scientists to view and study prison cells. Cells argon the basic units of invigoration organisms. In the 16oos, Anton van Leeuwenhoek( LAY vun hook) used a ace lens microscope to view bacteria, which until the could not be seen. Later, compound sporty microscope used several lenses and could magnify object up to 1500 generation their original size.
The scientist Robert Hooke looked at thin slices of cork under a compound microscope. Thinking the small shapes he saw looked homogeneous small rooms, he called them cells.
By he 1800s, microscopes had been improved allowing scientists to make other heavy observation. First, Robert Brown, a Scottish scientist, discovered that cells had an important inner compartment, the nucleus (NEW klee us). Then, Rudolf Virchow figured out that the nucleus controls the cells activities. Later, deuce German biologist, Matthias Schleiden and Theodore Schwann, did their own experiments and learned that all living things argon made of iodin or more cells.
What is cell possibleness?
The environment of Schleiden, Schwann, and other scientists led to the development of what is called the cell theory. It is one of the fundamental ideas of the science of biology.
The three main parts of the cell theory argon summarized below:
all in all living things are made up of one or more cells.
Cells are the basic units of structure and function in living things.
All cells come over cells.
How do microscope help scientist learn most cells?
In the 1930s and 1940s, microscopes were improved. Electron microscope allowed scientists to magnify an object up to 500 000 times using a beam of electrons instend of a beam of light. A scanning electron microscope (SEM) lets scientists see a cells three-dimensional shape. A transmission electron microscope (TEM) lets scientists see the stucture deep down a cell.
Microscope are continually being improved so...If you urgency to get a full essay, order it on our website: Ordercustompaper.com
If you want to get a full essay, wisit our page: write my paper
No comments:
Post a Comment