All living organisms are composed of one or more cells.
The cell is the basic unit of structure and function in all organisms.
New cells arise only from the division of pre-existing cells.
Exam technique
Be able to recall these three statements in order, this is a common 1–2 mark recall question.
How Cell Theory Guides Scientific Predictions
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Questions
Recap questions
1 of 5
Question 1
Recap question
Suppose an organelle is discovered that can grow, reproduce, and carry out its own metabolism independently of a host cell. How would this affect the definition of the smallest unit of life?
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Note
The Cell Theory is a fundamental principle in biology that states:
All living organisms are composed of one or more cells
The cell is the basic unit of structure and function in all living organisms
All cells arise from pre-existing cells
Deductive reasoning is a logical process that moves from general principles to specific conclusions. In science, it helps us make predictions based on established theories.
AnalogyThink of deductive reasoning like a math equation: if you know the formula (general principle), you can solve for specific values (predictions).
DefinitionCell TheoryA fundamental biological principle stating that all living organisms are composed of cells, the cell is the basic unit of life, and all cells come from pre-existing cells.