Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 53 - 53.4 - Concept Check - Page 1200: 1


Three life history traits: 1) Age during first reproduction 2) Reproductive lifespan 3) Number and size of offspring

Work Step by Step

Examples: 1) Some turtles reproduce at around 30 years old, while salmon begin reproducing at just 4 years. 2) Humans reach sexual maturity in the teenage years and are able to reproduce for several decades. Certain cetaceans and insects must reproduce within a single year in their lives. 3) Rhinoceros with single calf vs turtles with hundreds of eggs. Organisms always demonstrate tradeoffs in terms of life histories: Those who produce few offspring are able to offer more intensive care and those who produce many offspring cannot provide as much.
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