Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 1 - The Science of Biology - Review Questions - Understand - Page 16: 3

Answer

A.

Work Step by Step

A hypothesis is a recent or temporary explanation for some observation, and it needs to be tested. C. and D. are much too well supported/tested/permanent to be hypotheses, and B. is an observation, not an explanation, and, thus, not an hypothesis. So, A. is correct.
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