Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 43, Problem 2CT
Summary Introduction
To explain: The reason that how the animals assist individuals that could evolve through kin selection.
Concept introduction: Altruism is a process when an organism behaves in a way that benefits others instead of being harmed or risking oneself. Eusocial animals are organisms that live in a multigenerational family group with a reproductive division of labor. The only way to develop the altruistic behavior is through kin selection.
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You document altruism in an animal species that you are studying: female zebras running at the back of the group, closest to the pursuing predator, as the group runs to escape a predator. Both kin selection and reciprocal altruism can explain this behavior. What piece of evidence would support the hypothesis that it's kin selection?
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Chapter 43 Solutions
Biology: The Unity and Diversity of Life
Ch. 43 - Prob. 1DAACh. 43 - Prob. 2DAACh. 43 - Prob. 3DAACh. 43 - Whether a fruit fly is a sitter or a rover depends...Ch. 43 - Prob. 2SQCh. 43 - An animal that navigates by the stars needs...Ch. 43 - The honeybee dance language transmits information...Ch. 43 - A _______ is a chemical that conveys information...Ch. 43 - Prob. 6SQCh. 43 - Generally, living in a social group cost the...
Ch. 43 - Prob. 8SQCh. 43 - Prob. 9SQCh. 43 - Prob. 10SQCh. 43 - A honeybee worker is a ________. a. fertile female...Ch. 43 - Prob. 12SQCh. 43 - Prob. 13SQCh. 43 - Prob. 14SQCh. 43 - Prob. 15SQCh. 43 - Prob. 1CTCh. 43 - Prob. 2CTCh. 43 - European cuckoos and North American brown-headed...Ch. 43 - When researchers gave pair-bonded voles...
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- Fish produce a hormone called isotocin, a hormone that is similar to oxytocin in mammals. Both hormones, oxytocin and isotocin, have been linked to social behaviors including the suppression of social anxiety, trust, and attachment. Prior to this study, the relationship between isotocin in the bloodstream and the amount of aggression or submission individual cichlid fish display was unknown. The researchers hypothesized that isotocin would suppress aggressive behaviors in cichlids to promote social cohesion as these fish exist in large social groups (schools). To address this hypothesis, each of 10 fish were exposed to two treatments, 1 week apart. One at a time, a fish was randomly selected from the group of 10 and either injected with a saline solution (that served as the control) or with isotocin. After this injection, the fish was returned to its group and the amount of aggressive and submissive behaviors the fish demonstrated was recorded for the next 10 minutes. One week later…arrow_forwardFish produce a hormone called isotocin, a hormone that is similar to oxytocin in mammals. Both hormones, oxytocin and isotocin, have been linked to social behaviors including the suppression of social anxiety, trust, and attachment. Prior to this study, the relationship between isotocin in the bloodstream and the amount of aggression or submission individual cichlid fish display was unknown. The researchers hypothesized that isotocin would suppress aggressive behaviors in cichlids to promote social cohesion as these fish exist in large social groups (schools). To address this hypothesis, each of 10 fish were exposed to two treatments, 1 week apart. One at a time, a fish was randomly selected from the group of 10 and either injected with a saline solution (that served as the control) or with isotocin. After this injection, the fish was returned to its group and the amount of aggressive and submissive behaviors the fish demonstrated was recorded for the next 10 minutes. One week later…arrow_forwardDescribe the phenomenon in which two organisms occupying the same geographical area show the same strategies of adaptation.arrow_forward
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