newtons law of motion states blah blah blah
A microscope is designed to magnify very small things such as cells.
They used the microscope invention to look at cells and what they do from close up, but still safe.
microscope
Well I'll just use two points from the cell theory: 1) The cell is the basic unit of structure and function in all living things. In the late 1800s, a scientist named Schwann told the world that he observed cells in animals. A short time later, another scientist named Schleiden said the same for plants. This was a huge start to the cell theory. 2) All cells rise from pre-existing cells. It's hard to believe but at one point actual scientists believed that living things could come from inorganic matter. It was not until Louis Pasteur's experiment with the S-shaped flask, and the boiled water, that people started to shun the thought of spontaneous generation and look at this final addition to the cell theory.
At first, carbon and other stuff formed into cells. These cells turned into spores and the into fish, mudskippers blah bla blah. You go look up somewhere else.
You use a microscope to look at a cell.
Three German scientists, Matthias Schleiden, Theodor schwan, and Rudolph Virchow all created the cell theory. This theory states that all living things are made of cells, all cells come from other cells, and that cells are the basic units of structure and function. I hope this helps you, I just learned this in my science class. Robert Hooke look it up.
The build-up of the cell is very different. Look up an image of an animal cell, then look up an image of a plant cell. They're much different
plant cells store food in the plant and animals look for food to eat
Plant cells look more box-shaped because of the rigid cell wall surrounding the cell, while animal cells tend to look like an oval because of the lack of a cell wall.
Both onion cells and nerve cells have the same look. Obviously they have both got cells in them and have nerly everything the same.
A cell of a dog is an animal cell, and animal cells are microscopic. Animal cells don't have a cell wall or chloroplasts. Plant cells do. Plant cells and animal cells both have a cell membrane, mitchondria, vacuoles, nucleus, and cytoplasm. Animal cells are disformed or roundish and plant cells are square and boxlike.