Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 19, Problem 11PS
One hypothesis suggests that population cycles observed in snowshoe hares are caused by winter food shortages. Describe an experiment to test this hypothesis.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The following experiment is used for the following question.
A researcher discovered a species of moth that lays its eggs on oak trees. Eggs are laid at two distinct times of the year: early in spring when the oak trees are flowering
and in midsummer when flowering is past. Caterpillars from eggs that hatch in spring feed on oak flowers and look like oak flowers, but caterpillars that hatch in
summer feed on oak leaves and look like oak twigs.
How does the same population of moths produce such different-looking caterpillars on the same trees? To answer this question, the biologist caught many female
moths from the same population and collected their eggs. He put at least one egg from each female into eight identical cups. The eggs hatched, and at least two larvae
from each female were maintained in one of the four temperature and light conditions listed below.
Temperature
Springlike
Springlike
Summerlike
Summerlike
Day Length
Springlike
Summerlike
springlike
summerlike
In each of the…
A population of rabbits contained 200 individuals in 2017 and 300 in 2018. What was its finite rate of increase, λ, over that one year?
In the graph, what is the carrying capacity of the deer in this particular environment?
Chapter 19 Solutions
Campbell Essential Biology (7th Edition)
Ch. 19 - What two values would you need to know to figure...Ch. 19 - If members of a species produce a large number of...Ch. 19 - Prob. 3SQCh. 19 - Prob. 4SQCh. 19 - Prob. 5SQCh. 19 - Prob. 6SQCh. 19 - According to data on ecological footprints, a. the...Ch. 19 - The mussel secretes a combination of molecules...Ch. 19 - The lynx is one of the main predators of the...Ch. 19 - Life history traits, like anatomical features, are...
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
- 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_forwardThe pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes? a) The proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilization b) Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs. c) DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations. d) Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT.arrow_forwardThe effective population size of the nematode Caenorhabditis brenneri was estimated to be 15,200,000 using genetic data. The effective population size in humans has been consistently estimated around 10,000. Reconcile these estimates of effective population size considering that human population size is currently about 7,400,000,000..arrow_forward
- O Villay Use the passage to answer the question. Mule Deer A) In a short paragraph, propose a hypothesis to test the effect of a zoned reserve on mule deer populations. Justify your hypothesis based on your This image shows a male mule deer (Odocoileus hemionus), which is native to western North America. Named for their large ears, mule knowledge of zoned reserves. deer are hunted for sport and food under strict management B) In 1-2 short paragraphs, outline a field experiment to test your hypothesis on the effect of a zoned reserve on mule deer populations. Describe your control group, experimental group, and the data you would collect. Identify at least two environmental factors that could affect your data collection and practices, such as designated hunting seasons and limits on how many deer a hunter can take. Imagine a scenario where the local mule deer population has declined after a harsh winter. Wildlife management agencies have how you would address them, if possible. proposed…arrow_forwardThe pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes?* nd 2 chool The proportion of DDT-resistant mosquitoes in a population remains constant due to O the metabolic costs of DDT utilization DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs. Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT. A population of 1.492 finches is intróduced to a rainforest. Over the next year, the finches show a death rate of…arrow_forwardHoney bee workers from a colony in North Carolina are visiting two food sites, A and B, at 6 am as shown below. Site A is 1500 m from the hive; site B is 300 m from the hive. While most of the foragers are out in the field, a sudden downpour strikes which drowns many of the bees outside the hive. As a result, there is a shortage of foragers in the nest at a time when much food is available in the field. Which of the following can you correctly predict will happen: a. The loss of foragers will cause increased activity of the Gp9 gene in some of the bees inside the nest, which will decrease their JH levels, causing them to revert to nursing behavior and raise more brood to quickly replace the lost foragers. b. The loss of foragers will result in decreased transfer of ethyl oleate to the younger bees, which will cause JH titers in some of the younger bees to increase and they will become precocious foragers. c. The loss of contact with older bees will cause increased Amfor and…arrow_forward
- In the Introduction, the authors set the stage for their experiment. What ecological issues were facing Yellowstone National Park when wolves were no longer there, and how were the researchers going to test the questions they wanted to ask? In 4 – 6 sentences, summarize the Methods section of this paper. One of the questions the researchers asked when they began their experiment was “With wolves now back on the Yellowstone landscape for 15 years, how has the reintroduction of wolves affected the recruitment of the woody browse species?” Use data from the Ripple and Beschta paper to support your answer. In any scientific paper, the Discussion is often the most hard-hitting, and where researchers elaborate and explain their results in the context of their experiment and the real world. Explain why when researchers tried culling some of the elk herd it did not have trophic effects, while reintroducing wolves did have trophic effects. Describe the multiple impacts of wolf…arrow_forwardConsider the temperature effect in the sex determination of a turtle species represented in the graph below. 100 What effect would a decrease in temperature below the epivotal temperature have on sex ratios of these turtles? 50 FT MT Temperature Fewer males and females will result. None of the other answers is correct. No difference in the proportion of females to males will result as only colder temperatures will alter the sex ratio in the offspring. More males than females will result. More females than males will result. To Percent female O O O Oarrow_forwardUsing the following diagram, determine the value of the PA and P for this animal compared to the population. (You do not have to account for the mean as that is the line.) Ep = +5200 BV = +2300 GCV = -1500 Et= -1800 Phenotypic value (P-H) Producing ability (PA)arrow_forward
- Why might medium ground finch population responses to short-term episodic increases in rainfall differ from their responses to increases in rainfall lasting for years or decades?arrow_forwardBeetle populations is shown in the graph. Explain why these interpretations are not as reliable as the data itself.arrow_forwardIcefishes live in the Southern Ocean, which encircles Antarctica. Icefishes have evolved to produce antifreeze proteins which prevent ice crystals from forming in their blood, when ocean temperatures drop below the freezing point of fresh water. The antifreeze proteins, which are produced in different amounts (high, medium and low) in different fishes, help them live in the cold waters. What are the different variations of the antifreeze protein present in the population of icefish? 2. Out of the variations which one is the favorable trait in the environment of the icefish? 3. Which icefishes will natural selection select for? 4. How will the icefish population in very cold waters, change over time? 5. Describe the adaptation in icefish (in terms of allele frequency and reproductive fitness)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Infectious Diseases - How do we control them?; Author: Let's Learn Public Health;https://www.youtube.com/watch?v=2JWku3Kjpq0;License: Standard Youtube License