INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
17th Edition
ISBN: 9781260704310
Author: HICKMAN
Publisher: MCGRAW-HILL CUSTOM PUBLISHING
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Textbook Question
Chapter 7, Problem 1FFT
Fish and amphibians tend to have less complex reproductive systems than those of some reptiles, birds, and mammals. Why do you think this might be the case?
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(A) Monogamy is rare in mammals. Why? (B) In contrast it is common in birds.
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Males -- because fewer are available to mate
Males – because male-male competition is incredibly strong
Females – because sperm are cheap to produce
Female – because the operational sex ratio is biased in their favor
The sperm of chimpanzees have faster swimming speeds than those of gorillas. Based on what you know about sperm competition, what would you predict about differences between these two species in female re-mating frequency and sperm viability?
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In chimps, females mate multiply and sperm live for a long time
In chimps, females mate only one, and sperm live for a long time
In chimps, females mate multiply, and sperm live for only a day
Which of the following sexual traits is…
Chapter 7 Solutions
INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
Ch. 7 - Define asexual reproduction, and describe four...Ch. 7 - Prob. 2RQCh. 7 - Explain why genetic mutations in asexual organisms...Ch. 7 - Define two alternatives to bisexual...Ch. 7 - Define the terms dioecious and monoecious. Can...Ch. 7 - Prob. 6RQCh. 7 - What is a germ-cell line? How do germ cells pass...Ch. 7 - Explain how a spermatogonium, containing a diploid...Ch. 7 - Prob. 9RQCh. 7 - Name the general location and give the function of...
Ch. 7 - Prob. 11RQCh. 7 - What are the male sex hormones and what are their...Ch. 7 - Explain how the female hormones GnRH, FSH, LH, and...Ch. 7 - Explain the function of the corpus luteum in the...Ch. 7 - Describe the role of pregnancy hormones during...Ch. 7 - If identical human twins develop from separate...Ch. 7 - Fish and amphibians tend to have less complex...
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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
- in your own words: Compare the reproductive organs of reptiles and birds. How are their reproductive patterns advantageous for their survival?arrow_forwardWhy is sexual reproduction useful if only half the animals can produce offspring and two separate cells must be combined to form a third?arrow_forwardWhich of the following groups include at least some members that exhibit internal fertilization? Choose all that apply. O Amphibians O Reptiles Birds Mammalsarrow_forward
- How do different types of energy investment by females contribute to the reproductive success of a frog, a chicken, and human? Drag the appropriate items to their respective bins. Reset Help embryos have gelatinous coat and lack internal membranes internal fertilization external fertilization embryos have internal membrane invest energy to the protection of their embryos by strong shells invest energy to the gamete production invest energy to the protection of their embryos by internal development Frog Chicken Humanarrow_forwardLarge testes are probably advantageous in species with sperm competition because larger testes produce more sperm which increses males' probability of fertilization females choose males based on testes size more testosterone production increases fighting ability of males larger testes produce larger sized sperm which have a competitive advantage over other spermarrow_forwardWhich of the following are mismatched? (a) endoderm; lining of the digestive tube (b) ectoderm; circulatory system (c) mesoderm; notochord (d) mesoderm; reproductive system (e) ectoderm; sense organsarrow_forward
- A scientist for one of the Water Management Districts near Victoria conducts a study of the effects of industrial wastewater on marine clams (animals that are sessile as adults) by comparing the density and reproductive condition of clams collected within 100 m of a discharge pipe with those collected 10 km away. He found very low densities of clams near the pipe and those that were there had very small gonads. You have been hired by the company discharging wastewater via this pipe to explain why these data should not be used to shut you down. What scientific arguments are you going to make to the review board? Hint: don’t talk about study design issues….tell me about what other ecological factors might be at play here.arrow_forwardWhy Do So Many Animals Reproduce Sexually Rather than Asexually?arrow_forwardWhy is it immoral to culture headless embryos when in fact it can help to help people who need organ donors?arrow_forward
- Mate guarding is an evolved response to sperm competition. Chimpanzee (Pan troglodytes) females regularly mate with several males in the same estrous cycle, whereas gorilla (Gorilla gorilla) females almost never do, since they typically live in bands, each controlled by a single, powerful male. How large (as a proportion of body size) should the testes of chimpanzee males be relative to gorilla testes (Harcourt et al. 1981)? If the testes of men are more similar to those of chimpanzees, what would this tell us about the intensity of sperm competition during our evolutionary past? If, on the other hand, human testes resemble those of gorillas, what conclusion is justified? Please don't write from any online source.arrow_forwardwhat are the correct options?arrow_forwardWhich statement below is FALSE regarding the differences between sea urchin and mammals? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a External fertilization is observed in sea urchins, whereas internal fertilization is used in mammals. External fertilization is observed in mammals, whereas internal fertilization is used in sea urchins. Urchins produce thousands of eggs, whereas humans produce only one egg that when fertilized becomes a zygote. Once sea urchins release their gametes, they move on to feeding on other normal activities and do not worry about their progeny at all. Unanswered A Submitarrow_forward
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