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Living things are different from nonliving things (Any individual form of…
Living things are different from nonliving things
Any individual form of life that uses energy to carry out its activities is an organism
Living things have these characteristics, organization, ability to develop and grow, the ability to respond to the environment, and the ability to reproduce.
All organisms get water and materials from the environment
All living things are made of cells
A cell is the smallest unit of a living thing.
These organisms are unicellular and usually too small for you to see directly.
Some organisms are made of a single cell.
The microscope led to the discovery of cells
Most calls are microscopic, too small to see without the aid of a microscope.
It took the invention which makes an object appear bigger than it is.
A microscope is an instrument which makes an object appear bigger than it is.
The cell theory is important to the study of biology
The three ideas on page 13 are so important that they are grouped together using the word theory.
A theory must be supported by evidence, including experimental evidence and observations.
A scientific theory is a widely accepted explanation of things observed in nature.
Cells come from other cells
The studies of Hooke and Leeuwenhoek made people ask if all living things have cells
They continued to find cells, although often these cells looked very different from on another.
People continued to servere samples taken from all sorts of living matter.