Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 1 - The Science of Biology - Review Questions - Synthesize: 2b

Answer

The shape of the flask allows for sterility of the flask to be maintained but also allows for boiling the broth.

Work Step by Step

The swan-neck allows the flask to be boiled without it exploding--there is an outlet for pressurized gas from boiling--but keeps microbes from flowing back into the flask past the neck.
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