18
QuizMultiple Choice

Analyzing Evidence — Unit test

Question 18 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC

Sometimes new information results in minor changes to a theory. But sometimes new information results in a theory being discarded as incorrect. An example of an incorrect theory that was disproved by the discovery of new information is

Answer
A
Ptolemy’s theory of the solar system.
B
the original cell theory.
C
the germ theory.
D
plate tectonic theory.

Explanation

Ptolemy’s theory placed Earth at the center of the universe, with the Sun and planets moving around it. Later observations and evidence, including the motions of planets and moons, supported a Sun-centered model instead, so Ptolemy’s theory was discarded. The original cell theory was expanded as new information emerged, while germ theory and plate tectonic theory remain supported scientific theories.

AI-written and checked against the verified answer.

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