Concept explainers
How is migration based on circannual rhythms poorly suited for adaptation to global climate change?
To determine: The way in which “the migration based on circannual rhythms is poorly suited for adaptation to global climate change”.
Introduction: Circannual rhythms are biological rhythms that span a period of one year. These rhythms are generated endogenously in the organisms like several migratory birds and others. These rhythms are regulated by seasonal changes in the length of the photoperiod.
Explanation of Solution
Generally, migration and reproduction is correlated with food availability. The circadian rhythms persist even in constant conditions such as constant darkness or constant light, indicating that these rhythms are endogenously regulated. Circannual rhythms help animals to anticipate the precise time for reproduction, migration, and others. This maximizes the survival of offspring and also ensures the protection of animals from extreme weather. However, the migration that dependent on circannual rhythm is poorly suited for adaptation to global climate change. This is because it can lead to migration of animals to the place before the arrival of favorable condition. This will lead to disruption of their internal biological clock. Over the time, the species can also become extinct.
Circannual rhythms are very essential to anticipate the precise timing for important events such as reproduction and migration. In this way, they enhance the survival of the animals.
Want to see more full solutions like this?
Chapter 51 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
Additional Science Textbook Solutions
Microbiology: An Introduction
Human Anatomy & Physiology (2nd Edition)
College Physics: A Strategic Approach (3rd Edition)
Human Physiology: An Integrated Approach (8th Edition)
Biology: Life on Earth (11th Edition)
Organic Chemistry (8th Edition)
- You 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_forwardA group of researchers are interested in whether temperature has an affect on time to metamorphosis in a species of frog. Eggs from a single pond were obtained and raised at either 15°C or 25°C until metamorphosis completed. Time (days) 15°C 25°C 360 379 375 353 354 299 378 349 385 323 359 298 371 301 355 375 μ 367.1 334.6 S 11.66 33.85 Time to metamorphosis at 25°C quantile Time to metamorphosis at 15°C quantile 385 380 375 370 365 360 355 +3 -1.5 380 360 340 320 300 -1.0 -0.5 00 05 10 1.5 Normal quantile -1.5 -1.0 -0.5 00 0.5 1.0 Normal quantile a) List the potential statistical tests that could be used to test the researcher's hypothesis, how they compare in terms of power, and the assumptions made by those tests. (3 marks) b) Based on the data, which test should be used? Provide a brief explanation and test any assumptions, as necessary to come to your conclusion. (4 marks) c) Conduct a statistical analysis using that test. (8 marks)arrow_forwardAnswer the following questions regarding adaptive and non-adaptive developmental plasticity: a) Define adaptive developmental plasticity, providing at least one example of a case study b) Define non-adaptive developmental plasticity, providing at least one example of a case study c) Describe at least one way in which adaptive developmental plasticity and non-adaptive developmental plasticity differ.arrow_forward
- What makes the ecosystem of the Galapagos Island different than those found on large continentals? Upon what did Charles Darwin's original research on finches of the Galapagos Island focus? Describe the research Peter and Rosemary Grant conducted on the finches in the 1970's. Discuss the relationship between the finches' beak depth size and survival in terms of natural selection and fitness and the environmental causes that shaped the finch population of the islands.arrow_forwardAllan Pounds and Kevin Anchukaitis both think only one factor - either climate change or an El Nino event - killed the golden toad. However, might they both be right? Could it be that the dry conditions created by the El Nino event were worsened by underlying climate change effects, so that El Nino and climate change together caused the extinction of the golden toad in Monteverde? Yes, the El Nino event in combination with climate change could have led to the extinction of the golden toad. Multiple factors can influence species' extinction. O No, only one factor - either climate change or El Nino - acting alone killed the golden toad. Species are only ever affected by one environmental factor, never by multiple factors.arrow_forwardA mile-wide river separates two rabbit populations for a million years. Over time, one population evolves long ears and is more active near dark, when they can hear predators coming but the predators can't easily see their ears sticking up above the grass. The other rabbit population evolves short ears and is more active in the middle of the day; it is harder to see, but also doesn't hear predators approaching as well. Eventually the river dries up, and the rabbits start encountering each other again. What do you predict will initially happen when the populations first start to meet? O rabbits will avoid hybridizing, since it is usually a mistake rabbits will interbreed and have offspring with intermediate ears that are visible during the day and not as good at hearing predators at night O rabbits will know not to mate with any that don't have their same "ear size" O rabbits will already show complete reproductive isolation after one million years and will ignore each other, having…arrow_forward
- How do the classic experiments of C.F. Huffaker, using mites and oranges in the lab, inform us about how predator and prey populations are able to persist in nature?arrow_forwardIn birds of paradise that populate tropical rainforest ecosystems, bright colored beaks and feathers are commonly found. These phenotypes continue to persist, even though brightly colored birds are more easily seen by predators. Which of the following would best describe the reason behind the persistence of these phenotypes in birds of paradise?arrow_forward1) Think back to the example of ovenbird evoluon in South America. Ovenbirds are a diverse family of small, insect-eang birds that live mainly in South America. Different ovenbird species have adapted to rocky ocean shorelines, snowy mountains, scorched deserts and tropical rainforests. Like finches, ovenbirds have a variety of beak sizes and shapes, an important indicator of food preference that makes them ideal for studying evoluon. In ovenbirds, "some [beaks] are long and down-curved, like a scythe, for probing into crevices in tree bark and others have short dagger-like bills." What conclusions did the researchers reach? A) ovenbirds are diverse because they do not share any common ancestors B) ovenbirds because successful because they are not native to the area and could easily colonize the area C) birds have different beaks that help them exploit different resources and avoid competition 2) One ant species from Africa is best at competing for space, but is worse at colonizing a…arrow_forward
- A population of rodents establishes itself in a habitat that has previously been colonized by its same species. Soon after, the construction of an engineering work causes habitat degradation, which causes the total population to slow down. As time passes, the degradation is greater.a) Formulate mathematically the variation of the population size N of the rodent population at time t, first for the situation described without engineering work and then for the scenario with engineering work. Define the necessary parameters for your model. b) Indicate the equilibrium values of the population N.c) By what time should the population be extinct?arrow_forwardOut of the three patterns, disruptive, directional, and stabilizing, which pattern of natrual selection is currently exhibited by banded snails as a result of human interference due to the urban heat island?arrow_forwardIn a study in which men and women were asked to sit at a computer and navigate through a virtual maze, the men were able to complete the task more quickly and with fewer errors over five trials than the women (Moffat et al. 1998). What possible proximate developmental mechanisms might be responsible for this sex difference in navigational ability? Use the evolutionary explanation for sex differences in spatial learning ability by voles to make a prediction about the nature of human mating systems over evolutionary time.arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning