Campbell Biology in Focus; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433776
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
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?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
How would self-sacrifice of male redback spiders be an adaptive behaviour?
Select one:
a.
When males meet a female and self-sacrifice, it activates enzymes that make
his sperm more fit and able to fertilize more eggs.
b. Males are able to mate with one female, then mate with another female
nearby, before being devoured by the first female.
C.
Males only use self-sacrificing behaviour once they have mated with several
females and have exhausted their sperm supplies.
d. The chance of a male meeting more than one female is quite low; self-sacrifice
maximizes mating time with and sperm transfer to any female the male finds.
Suppose you spot two species of birds feeding side by side, eating seeds from the same plant. You begin to wonder whether competition is at work. Describe how you might design scientific research to address this question. What observations would you try to make at the outset? Would you try to manipulate the system to test your hypothesis that the two birds are competing? If so, how?
. 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?
Chapter 39 Solutions
Campbell Biology in Focus; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for 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...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Female parasitoid wasps search for insect hosts in which to lay eggs, and they can often discriminate among individual hosts that are more or less suitable for their offspring. Behavioral ecologists have asked whether or not the wasps’ willingness to lay eggs in less suitable hosts varies with the female’s age. On the basis of life history theory, what pattern of change would you predict? Does life history theory make any other predictions about animal behavior?arrow_forwardEVOLUTION LINK When a black-tailed prairie dog or other small animal dies, other prairie dogs bury it. Develop a hypothesis to explain how this behavior may be adaptive. How would you test this hypothesis?arrow_forwardMany lines of evidence, including biochemical evidence, show that living birds are direct descendants of dinosaurs. A number of dinosaur lineages had feathered dinosaurs, not just the lineage that includes living birds. Do you think that is it justified to believe that all feathered dinosaurs had behaviors known from living birds? Such behaviors of birds include colonial nesting, sexual displays by males using feathers, males moving to display their ornamental feathers to female mates. Give a brief reason for your answer.arrow_forward
- 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 constraintarrow_forwardThink critically A student want to study the Moulting in mosquitoes. He very much clear about the mechanism of Moulting but unfortunately he forgot to choose the right hormone. He has two types of hormone, juvenile hormone and moult inhibiting hormone. He tries with both the hormone in mosquitoes and observed the results. What will be the results to the mosquitoes development with the juvenile hormone and the moult inhibiting hormone. It's not an assignment or complex question. It's an entamology question. Kindly answer and Don't reject it under complex or essay type. It's not comes under those category. Thank youarrow_forwardWhich of the following questions is most closely associated with anultimate cause of a behavior?a. How does a squid alter its color to blend in with its environment?b. How does a hummingbird’s body shape influence its ability tohover?c. How do alarm calls affect prairie dog fitness?d. Which cues do monarch butterflies use during migration?arrow_forward
- In your own words (please discuss properly) Are social insects better able to modify the environment than solitary species? Explain. Cite concrete evidence to prove your point.arrow_forwardYou want to distinguish between two hypotheses to explain the patterns you see: 1) Males not feeding the young is an adaptation to dimorphism 2) If males don't feed the young in a species, it will allow them to become brightly colored To begin to address this question, map the characters changes in dimorphism and males feeding the young onto each of the trees on the previous page. CHARACTER SEXUAL DIMORPHISM MALES FEED YOUNG Cassin's Vireo No No Red Fox Sparrow Cape May Warbler Cedar Waxwing Golden-Crowned Kinglet Pyrrhuloxia Yes No No No No Yes No Yes Yes No California Gull No Yes Note: This data is fictional 5) Which of the hypotheses in part 4 is consistent with your analysis? Explain why in a brief paragraph.arrow_forwardOne of Darwin’s finches, the medium ground finch (Geospiza fortis), is found on the small island of Daphne Major. These finches are seedeating birds. A major drought occurred on the island in 1977. Following the drought, the average beak size of medium ground finches had increased about 3%–4%. Why might a drought lead to an evolutionary change in beak size? Propose a hypothesis and explain how you could go about testing it.arrow_forward
- Can you answer this question regarding fish What benefit does parental care for eggs provide? What are the consequences?arrow_forwardOne of the main objectives of BI308 is to learn to think scientifically about animal behaviour. I talked about the problems that arise when we tell fables or just-so stories about the things that animals do. Some of the tools and approaches behavioural ecologists use would seem to be designed to help us be scientifically rigorous in our conclusions. But are they perfect? Think about optimality modeling. Could it be misused, leading to the kind of unscientific stories we were hoping to avoid or other misconceptions? Explain your reasoningarrow_forwardMale and female ruffed grouse look similar, except during courtship when the males raise their neck feathers and fan out their tails to create a visual display (Figure 2). These grouse spend much of their time on the ground. How might natural selection have favoured this particular adaptation? A Figure 2 Male ruffed grouse in courtship displayarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Animal Adaptations for Kids, Learn about physical, life cycle, and behavioral adaptations of animals; Author: Learn Bright;https://www.youtube.com/watch?v=m2MibjJgyjs;License: Standard youtube license