Question

select the statement(s) that accurately describe how the evidence for spontaneous generation changed. hint! spontaneous generation is the idea that living organisms come from nonliving things. boiled broth did not have any organisms living inside. over time, living organisms grew in the broth even though it was closed. small organisms were caught in the neck of the flask and did not reach the broth. thc broth was boiled and then pasteur saw living organisms inside. pasteur found that organisms in the broth came from outside the flask.

Explanation:

1. Boiled broth did not have any organisms living inside: When broth is boiled, it sterilizes the broth, killing existing organisms, so initially, boiled broth has no living organisms. This is part of Pasteur's experiment setup to test spontaneous generation.
2. Over time, living organisms grew in the broth even though the flask was closed: If spontaneous generation were true, living organisms would appear from non - living broth over time even in a closed flask. But Pasteur's experiment showed this was not the case when the flask was properly designed (with a curved neck), but this statement represents the idea of spontaneous generation which was being tested.
3. Small organisms were caught in the neck of the flask and did not reach the broth: In Pasteur's flask with a curved neck, air could enter, but small organisms (like bacteria) in the air were trapped in the neck and couldn't reach the broth. This was a key part of his experiment to show that organisms didn't spontaneously generate in the broth.
4. Pasteur found that organisms in the broth came from outside the flask: Pasteur's experiment concluded that the organisms in the broth were from outside (in the air), not generated spontaneously from the broth. The statement "The broth was boiled and then Pasteur saw living organisms inside" is incorrect because boiling kills organisms, and in the properly set - up experiment, organisms didn't appear in the broth spontaneously. The hint - related statement about spontaneous generation is a definition, not evidence of how the evidence for spontaneous generation changed.

Answer:

• Boiled broth did not have any organisms living inside
• Over time, living organisms grew in the broth even though the flask was closed
• Small organisms were caught in the neck of the flask and did not reach the broth
• Pasteur found that organisms in the broth came from outside the flask