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1.1: Introduction to Cells

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State three parts of the cell theory.



Understanding: According to the cell theory, living organisms are composed of cells.
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Terms in this set (53)
State three parts of the cell theory.



Understanding: According to the cell theory, living organisms are composed of cells.
The cell is the basic unit of life (nothing smaller is alive).

All living things are composed of cells.

Cells come from preexisting cells.
Image: *State three parts of the cell theory.* Understanding: According to the cell theory, living organisms are composed of cells.
Outline evidence that supports the cell theory.



Understanding: According to the cell theory, living organisms are composed of cells.
Repeated observations and experiments support the cell theory.

We have never observed the cell theory not to be true.
Image: *Outline evidence that supports the cell theory.* Understanding: According to the cell theory, living organisms are composed of cells.
Compare the use of the word theory in daily language and scientific language.



Understanding: According to the cell theory, living organisms are composed of cells.
In daily use: a theory is a guess, there is doubt.

In scientific use: a theory has been shown to be true through repeated observations and experiments. There is no current doubt. As of yet, no evidence has been collected that does not support the idea.
Image: *Compare the use of the word theory in daily language and scientific language.* Understanding: According to the cell theory, living organisms are composed of cells.
Define "trend" and explain why trends are useful in scientific study.



Nature of Science: Looking for trends and discrepancies - although most organisms conform to cell theory, there are exceptions.
A prevailing tendency, a generalization.

Trends lead to the development of predictions of what we expect to observe.
Image: *Define "trend" and explain why trends are useful in scientific study.* Nature of Science: Looking for trends and discrepancies - although most organisms conform to cell theory, there are exceptions.
Define "discrepancy" and explain why discrepancies are useful in scientific study.



Nature of Science: Looking for trends and discrepancies - although most organisms conform to cell theory, there are exceptions.
An observation that does not fit the general trend; a variation from the trend.

Discrepancies from trends can lead to scientific questions. Answering those questions can lead to new discoveries and a deeper understanding of how the world works.
Image: *Define "discrepancy" and explain why discrepancies are useful in scientific study.* Nature of Science: Looking for trends and discrepancies - although most organisms conform to cell theory, there are exceptions.