Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 39, Problem 9TYU
SCIENTIFIC INQUIRY
Scientists studying scrub jays found that “helpers” often assist mated pairs of birds by gathering food for their offspring. Propose a hypothesis to explain what advantage there might be for the helpers to engage in this behavior instead of seeking their own territories and mates. How would you test your hypothesis? If it is correct, what results would you expect your tests to yield?
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. SCIENTIFIC INQUIRY Scientists studying scrub jays found that“helpers” often assist mated pairs of birds by gathering food fortheir offspring.(A) Propose a hypothesis to explain what advantage theremight be for the helpers to engage in this behavior insteadof seeking their own territories and mates.(B) Explain how you would test your hypothesis. If it is correct,what results would you expect your tests to yield?
You are a biologist working in the Amazon and you discover two new types of bird that are very similar in appearance. You want to know if they are the same species or different species. Other than looking at anatomy or DNA samples (which wouldn’t necessarily give you the answer anyway), what behavior could you look at to find out? LIMIT YOUR ANSWER TO ONE SENTENCE
Evidence supports that feathers evolved before flight, and were later co-opted for flight. This is an example of
Group of answer choices
exaptation
preadaptation
an intermediate state
a selective constraint
Chapter 39 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 39.1 - Contrast the role of Ca2+ in the contraction of a...Ch. 39.1 - WHAT IF? Why are the muscles of an animal that has...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - Prob. 2CCCh. 39.2 - Prob. 3CCCh. 39.3 - Prob. 1CCCh. 39.3 - MAKE CONNECTIONS How is the lunar-linked rhythm of...Ch. 39.4 - How might associative learning explain why...Ch. 39.4 - Prob. 2CC
Ch. 39.4 - MAKE CONNECTIONS How might a learned behavior...Ch. 39.5 - Prob. 1CCCh. 39.5 - MAKE CONNECTIONS Balancing selection can maintain...Ch. 39.6 - Prob. 1CCCh. 39.6 - Prob. 2CCCh. 39 - During the contraction of a vertebrate skeletal...Ch. 39 - Prob. 2TYUCh. 39 - According to Hamiltons rule, A. natural selection...Ch. 39 - The binding of calcium to the troponin complex A....Ch. 39 - Curare, a substance that blocks the acetylcholine...Ch. 39 - Prob. 6TYUCh. 39 - Prob. 7TYUCh. 39 - SCIENTIFIC INQUIRY Propose a hypothesis to explain...Ch. 39 - SCIENTIFIC INQUIRY Scientists studying scrub jays...Ch. 39 - Prob. 10TYUCh. 39 - FOCUS ON INFORMATION Learning is defined as a...Ch. 39 - SYNTHESIZE YOUR KNOWLEDGE Acorn woodpeckers...
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- These two Texas birds are both cuckoos . They live in different Analyze the birds in the pictures . Which bird is best adapted for life in a treeless desert environment and why ? F. Bird 1, because it has a crest on its head to focus sunlight on the head and a long tail for balance when standing or walking G. Bird 1, because it has long, broad feet to stand, walk, and run, and a strong , pointed bill for spearing prey H. Bird 2 , because it has small , narrow feet to perch on branches and take flight and a sharp, curved bill for spearing prey J. Bird 2 because it has a striped tail and dark upper body for camouflage in shade and a thick pointed bill for diggingarrow_forwardWhy do baby wildebeest play? What is the purpose of this behavior?arrow_forwardDiscuss some advantages of sociality for animals. If social living has so many advantages, why do many animals successfully live alone?arrow_forward
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