What is shown about scientific theories by the shift in belief of spontaneous generation to the use of other observations to explain where mold and moss come from? Theories usually are false. Theories are not useful. Theories change over time. Theories can be completely proven

the correct answer is: the theory can be proven

Explanation:

Scientific theories must be tested for their verification, these tests can be with observation or with the design of specific experiments to test their predictions.

By looking at both of them they may be correct.

Theories change over time

theories can be fully tested

The second of these statements is the most correct since, when tested, the theory is maintained over time for a long time until some experiment determines that it must be changed.

the correct answer is: the theory can be tested

Scientific theories are tested and proven over time; they are then considered scientific laws.

Explanation:

the other answer is wrong

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