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Living Things are Different from Nonliving Things (All organisms get water…
Living Things are Different from Nonliving Things
All organisms get water and other materials from the environment.
Living things have characteristics to grow into adults.
Any individual form of life that uses energy to carry out its activities is an organism.
All Living Things are Made of Cells
The cell is the smallest unit of a living thing.
The needs and characteristics of a single cell in a unicellular organism are the same as those for any organism.
Multi-cellular organisms have different types of cells that make up their body parts and help the organisms meet their needs.
The Microscope Led to the Discovery of Cells
Robert Hooke gave the cell its name, while looking at a sample of cork, a layer of bark taken from similarly shaped compartments that looked to him like tiny empty rooms, or cells.
A microscope is an instrument which makes an object appear bigger than it is.
Most cells are microscopic, too small to see without the aid of a microscope.
Cells Come from Other Cells
Life comes from life-that is, one cell comes from another cell.
People studying all types of living cells observed the same thing-that cells divide.
One living cell divides into two living cells.
The Cell Theory is Important to the Study of Biology.
Certainly they satisfy scientists' desire to understand the natural world, and they serve as foundations for further research and study.
A scientific theory is a widely accepted explanation of things observed in nature.
Louis Pasteur observed that mild that turned sour contained large number of tiny single-celled organisms called bacteria.