Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 12 - Think and Explain: 80

Answer

Cells take in nourishment through their walls. As they grow in mass, they require more nourishment, but the surface area increases at a slower rate than the mass does. Therefore, if it gets too big, it will have trouble taking in enough nutrients and will starve. At that point, the large cell divides into 2 smaller cells. At the cellular level, whales are similar to mice, and the upper limit in size will be similar.

Work Step by Step

This is discussed on page 239.
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