INTEGRAT PRINC OF ZOO (LL W/ CONNECT)
18th Edition
ISBN: 9781264177875
Author: HICKMAN
Publisher: MCG
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Textbook Question
Chapter 9, Problem 2RQ
Can you suggest why, during the evolutionary history of animals, there has been a tendency for maximum body size to increase? Do you think it inevitable that complexity should increase along with body size? Why or why not?
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Can you suggest why, during the evolutionary history of animals, there has been a tendency for maximum body size to increase?
Which choice best describes a reasonable mechanism for animal structures becoming better suited over evolutionary time to specific functions?
Animals that eat the most food become the most abundant.
Animals that restrict their food intake will become less abundant.
Animals with mutations that give rise to effective structures will become more abundant.
Animals with parents that continually improve their offspring's structures will become more abundant.
Animals with inventions that curtail reproduction will become more abundant.
In many ways, modern human lifestyles are at odds with our bipedal locomotion. At no point in history have humans been as inactive as today (especially in developing nations), which has led to a number of physical ailments, such as obesity, loss of mobility, and low back pain. What are some other impacts of evolution on our species? What are some ways we can alleviate these problems? You should include any recommended study tips, review videos, or other materials.
Chapter 9 Solutions
INTEGRAT PRINC OF ZOO (LL W/ CONNECT)
Ch. 9 - Prob. 1RQCh. 9 - Can you suggest why, during the evolutionary...Ch. 9 - Prob. 3RQCh. 9 - Body fluids of eumetazoan animals are separated...Ch. 9 - What are the four major types of tissues in...Ch. 9 - How would you distinguish simple and stratified...Ch. 9 - What three elements occur in all connective...Ch. 9 - What are three muscle tissue types found among...Ch. 9 - Describe the principal structural and functional...Ch. 9 - Match the animal group with its body plan:
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- In many ways, modern human lifestyles are at odds with our bipedal locomotion. At no point in history have humans been as inactive as today (especially in developing nations), which has led to a number of physical ailments, such as obesity, loss of mobility, and low back pain. What are some other impacts of evolution on our species? What are some ways we can alleviate these problems?arrow_forwardHumans as individuals have a number of disadvantages compared to other animals. For instance we are not very fast, strong, cannot see well in the dark, have a poor sense of smell and hearing compared to other animals, and we are not very good climbers. With all of these disadvantages how is it that we have been so successful? Shouldn't we have gone extinct as other humanoids such as Homo erectus? Discuss why humans have beaten the odds and are so successful.arrow_forwardWhy do penguins, seals, and tuna havesimilar body forms that permit rapid swimming? all share a common ancestor at some point in the past. all of their bodies have been compressed since birth by intensive underwater pressures. flying, pregnancy, and gill-breathing all require similar adaptations in form. the shape is a convergent evolutionary adaptation that reduces drag while swimming. this is the only shape that will allow them to maintain a constant body temperature in water.arrow_forward
- How is modularity beneficial to animal specialization during the course of evolution? Illustrate your explanation with an example.arrow_forwardSome advocates of the view that all organisms were created simultaneously by God argue that vestigial structures do not constitute evidence of evolution, because they show only that a divinely created structure can degenerate over time. According to this view, human tailbones are not evidence of evolution because they do not show that an adaptive improvement has occurred. Is this a valid argument?arrow_forwardHi! I am interested in getting some help with this question. This spectacular animal is a Lesser Bird of Paradise, Paradisea minor, from the highlands of Papua New Guinea. In the context of various evolutionary phenomena we have discussed this semester, why do you suppose: (a) This bird is confined to New Guinea and two nearby islands? Why would you not expect to find it in the mountains of Borneo? (b) This spectacular tail presumably attracts predators; why hasn’t natural selection acted to reduce it or camouflage it?arrow_forward
- What is an evolutionary tree? Is there a precise evolutionary tree known by science that explains the emergence and origin of every type of living being?arrow_forwardAccording to Darwinian evolution, there must be variation and selection. In the evolution of large claws in lobsters: What trait(s) might have been variable? What factors might have resulted in members of the population being selected? Speculate about why predatory cats such as the lion and the leopard have not evolved to be as fast as the cheetah. The elephant has evolved to be a great size, while the mouse has evolved to be relatively small. Explain how natural selection might favour a different size in each mammal species.arrow_forwardHow can we understand the evolutionary relationships among animals, and how, in turn,can we understand the biological traits that have given rise to such great diversity on a few branches of the animal tree of life?arrow_forward
- This spectacular animal is a Lesser Bird of Paradise, Paradisea minor, from the highlands of Papua New Guinea. In the context of various evolutionary phenomena, why do you suppose: (a) This bird is confined to New Guinea and two nearby islands? Why would you not expect to find it in the mountains of Borneo? Explain in detail. (b) This spectacular tail presumably attracts predators; why hasn't natural selection acted to reduce it or camouflage it? Explain in detail.arrow_forwardA species of Caribbean fish lives in groups of individuals in a burrow in the sand. When a predator swims by, one or more of the fish flick their fins to warn others to retreat to the safety of the burrow. Fish that flick their fins are more likely to be killed by predators than fish that do not. What is the most useful piece of information you would like to know in order to explain how fin-flicking can evolve, and why?arrow_forwardYou have seen many examples of how form fits function at all levels of the biological hierarchy. However, we can imagine forms that would function better than some forms actually found in nature. For example, if the wings of a bird were not formed from its forelimbs, such a hypothetical bird could fly yet also hold objects with its forelimbs. Describe the concept of “evolution as tinkering” to explain why there are limits to the functionality of forms in nature.arrow_forward
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