if you want to remove an article from website contact us from top.

    why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice?

    James

    Guys, does anyone know the answer?

    get why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice? from EN Bilgi.

    Quiz Results: Natural Selection and Adaptation: HHMI BioInteractive

    Natural Selection and Adaptation: Quiz Results

    1. Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice?

    They have a genetic mutation that affects their fur color.

    There is dark lava rock in the area where they live.

    Individuals change color to blend in with the environment.

    Predators eat light-colored rock pocket mice.

    Answers chosen: 0, 0, 0, 0

    Attempts: undefined

    2. Why do dark-colored rock pocket mice on dark lava flows have white bellies?

    There is no selection for dark bellies by visual predators.

    Mutations causing dark bellies do not occur.

    There is a reproductive advantage to having a dark belly.

    White bellies are an important part of camouflage.

    Answers chosen: 0, 0, 0, 0

    Attempts: undefined

    3. Mutations are always...

    good. bad. neutral.

    a change in an organism's DNA.

    Answers chosen: 0, 0, 0, 0

    Attempts: undefined

    4. When dark-colored fur gives mice a 1% competitive advantage and 1% of the population begins with dark fur, in about 1,000 years, 95% of the population will have dark fur. Which of the following statements is true?

    Dark-colored rock pocket mice, in this population, have fewer offspring than light-colored rock pocket mice.

    If dark-colored rock pocket mice had a competitive advantage of 0.1%, it would take more than 1,000 years for 95% of the population to have dark fur.

    If dark-colored mice had a competitive advantage of 5%, it would take more than 1,000 years for 95% of the population to have black fur.

    If dark-colored mice had a competitive advantage of 10%, it would take more than 1,000 years for 95% of the population to have black fur.

    Answers chosen: 0, 0, 0, 0

    Attempts: undefined

    5. What does Dr. Carroll mean when he says "while mutation is random, natural selection is not"? (Note: More than one answer is correct.)

    Mutations are caused by changes in the environment.

    Natural selection can favor some mutations and not others.

    Selection can change depending on the environment.

    Mutations for advantageous traits are more likely to be passed on to the next generation.

    Answers chosen: 0, 0, 0, 0

    Attempts: NaN

    6. In the lab, Nachman examined dark-colored mice from two different populations living hundreds of miles apart. The mice looked nearly identical. Their dark color was caused by two different genes. What does this tell you? (Note: More than one answer is correct.)

    Dark-colored fur evolved only once in rock pocket mice.

    There are at least two genes involved in creating dark-colored mouse fur.

    Dark fur color evolved independently on each lava flow.

    Different mutations in two different genes cannot generate the same phenotype.

    Under similar conditions, natural selection can favor similar adaptations.

    Answers chosen: 0, 0, 0, 0, 0

    Attempts: NaN

    Source : media.hhmi.org

    Evolution and the Rock Pocket Mouse

    Evolution and the Rock Pocket Mouse

    Last updated May 31, 2021 Dog Tales - NOVA

    Evolution of Caffeine Producing Plants

    A typical rock pocket mouse is about 170 millimeters long from its nose to the end of its tail, shorter than an average pencil. And at just 15 grams, this tiny mouse weighs about as much as a handful of paper clips. You can find populations of rock pocket mice all over the Sonoran Desert in the southwestern United States.

    There are two common varieties—a light-colored variety and a dark-colored variety. There are also two major colors of substrate, or surface materials that make up the desert floor. Most of the landscape consists of light-colored sand and rock, but patches of dark volcanic rocks that formed from cooling lava flows are found, separated by several kilometers of light colored substrate.

    Activity 1

    View the images of the rock pocket mouse populations in each location and record the numbers for each color.

    Card 1

    Location A: Number of mice with light-colored fur ______ Dark-colored fur _____

    Location B: Number of mice with light-colored fur ______ Dark-colored fur _____

    Card 2

    Location A: Number of mice with light-colored fur ______ Dark-colored fur _____

    Location B: Number of mice with light-colored fur ______ Dark-colored fur _____

    Card 3

    Location A: Number of mice with light-colored fur ______ Dark-colored fur _____

    Location B: Number of mice with light-colored fur ______ Dark-colored fur _____

    Card 4

    Location A: Number of mice with light-colored fur ______ Dark-colored fur _____

    Location B: Number of mice with light-colored fur ______ Dark-colored fur _____

    Arrange the cards in what you think is the correct order from the oldest to the most recent.

    Write the order you chose: _________________________________

    What are the two types of substrate that these mice live on? ____________________________________

    Activity 2

    Watch the video at biol.co/rockpock and answer the questions.

    1. How caused the unusual landscape at the Valley of Fire?

    flooding volcanic eruptions human activities forest fires

    2. Predators of the pocket mice hunt using what sense?

    smell sound vision heat

    3. Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice?

    Individuals change color to blend in with the environment.

    There is dark lava rock in the area where they live.

    They have a genetic mutation that affects their fur color.

    Predators eat light-colored rock pocket mice.

    4. Why do dark-colored rock pocket mice on dark lava flows have white bellies?

    There is no selection for dark bellies by visual predators.

    White bellies protect them from insects found in the desert

    There is a reproductive advantage to having a dark belly.

    White bellies are an important part of camouflage.

    5. Mutations are always

    good bad neutral

    a change in an organism’s DNA

    6. Dark pocket mice are found in locations that have dark substrate. Genetics revealed what surprising fact about mice in different locations?

    they had different mutations

    they had the same mutations

    they were not related

    7. Now that you have watched the video, go back to your set of cards and arrange them in the order you think they happened, starting with the oldest. You may change your order from your original idea. Once you are satisfied with the order, complete the table.

    Sequence (oldest to newest)

    1st (Oldest) 2nd 3rd 4th (Most recent) Location A # of Light Mice # of Dark Mice Location B # of Light Mice # of Dark mice

    8. How did you revise your sequence from your initial idea? Explain how you decided on the sequence.

    Activity 3: Data Analysis

    Use colored pencils to make a BAR GRAPH showing the numbers and colors of mice at each location. Be sure to label the X and Y axis and each of the bars on the graph.

    Activity 4: Summarize the Data

    1. Compare how the graph looks at Location A to how it looks at Location B. What is the obvious difference between the two?

    2. Explain why a rock pocket mouse color influences its overall fitness. Remember that “fitness” is defined by an organism’s ability to survive and produce offspring.

    3. Explain the presence of dark-colored mice at location A. Why is this phenotype (appearance) not more common in the population at that location?

    4. What is meant by this statement: “Mutation is random, but natural selection is not random.”

    Additional Discussion Questions

    1. Consider the dark and light colored rock pocket mice. Human skin color also comes in different shades. One hypothesis is that dark skin protected humans from intense UV radiation (sunlight). Based on this hypothesis, where do you think more darker skinned people lived? Suggest a reason why light skin may be an advantage for people living in other regions.

    Source : bio.libretexts.org

    Mastering Biology Chapter 22 Flashcards

    Start studying Mastering Biology Chapter 22. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

    Mastering Biology Chapter 22

    5.0 25 Reviews

    Charles Darwin _____.

    Click card to see definition 👆

    proposed natural selection as the mechanism of evolution

    Click again to see term 👆

    Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice?They have a genetic mutation that affects their fur color.

    Click card to see definition 👆

    They have a genetic mutation that affects their fur color.

    Click again to see term 👆

    1/28 Created by jkreska2

    Textbook solutions for this set

    Campbell Biology 11th Edition

    Lisa A. Urry, Michael L. Cain, Peter V Minorsky, Steven A. Wasserman

    1,678 explanations

    Anatomy and Physiology

    1st Edition OpenStax 599 explanations

    Search for a textbook or question

    Terms in this set (28)

    Charles Darwin _____.

    proposed natural selection as the mechanism of evolution

    Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice?They have a genetic mutation that affects their fur color.

    They have a genetic mutation that affects their fur color.

    Why do dark-colored rock pocket mice on dark lava flows have white bellies?

    There is no selection for dark bellies by visual predators.

    Mutations are always __________

    a change in an individual's DNA

    When dark-colored fur gives mice a 1% competitive advantage and 1% of the population begins with dark fur, in about 1000 years, 95% of the population will have dark fur. Which of the following statements is true?

    If dark-colored rock pocket mice had a competitive advantage of 0.1%, it would take longer for 95% of the population to have dark fur.

    What does Dr. Carroll mean when he says, "while mutation is random, natural selection is not"?

    -Mutations for advantageous traits are more likely to be passed on to the next generation.

    -Natural selection acts on traits.

    -Natural selection favors some mutations.

    In the lab, Nachman examined dark mice from two different populations living hundreds of miles apart. The mice looked nearly identical. Their dark color was caused by two different genes. What does this tell you?

    -Two completely different mutations in two separate genes can generate the same phenotype.

    -Dark fur color evolved independently on each lava flow.

    -Under very similar conditions, natural selection can favor very similar adaptations.

    -There are at least two genes involved in creating dark mouse fur.

    From his observations of organisms in the Galapagos islands, Darwin reasoned that _____.

    organisms had adapted to new environments, giving rise to new species

    This experiment is an example of hypothesis-based science.

    What question did the researchers ask?

    Can predation result in selection for color patterns in guppies?

    What was the researchers' main hypothesis?

    Predation results in selection for more drab color patterns in guppies.

    Researchers further hypothesized that if predation pressure is reduced, drab coloration would become less beneficial (since females prefer brightly colored mates). Based on this hypothesis, what prediction did the researchers test in this experiment?

    When guppies with drab colors are transferred to a pool with only killifish, the transplanted population will evolve brighter colors than the original source population.

    What was the control group in this study?

    the source population in the pike-cichlid pools

    What was the experimental group in this study?

    the transplanted population in the killifish pools

    How did the types of data the researchers collected enable them to test their prediction?

    Tracking the number and area of colored spots provided a quantitative way to compare the brightness of different populations.

    What conclusion would you draw from the data presented?

    Predation results in selection for more drab coloration in pike-cichlid pools.

    Which of the following would help strengthen the researchers' conclusion?

    if no other characteristics differed significantly between the source and transplanted populations

    Suppose that after 22 months, guppies from the transplanted population were returned to the source pool. What would most likely happen to those guppies?

    They would experience a higher rate of predation than the native population, and over time they would evolve and resemble the original source population.

    What data should you collect in order to test your prediction?

    predation rate on transplanted versus original source guppies, and color patterns of the population over time

    Some monkey flowers (Mimulus guttatus) living near the sites of copper mines can grow in soil containing high concentrations of copper, which is toxic to most plants. Copper tolerance is a heritable trait.

    The map below shows the area near an old copper mine, which contaminated the nearby soil with copper. A stream flows past the mine toward the lake at the bottom right of the map.

    -Nearly 100% of monkey flowers growing in copper-contaminated soil are copper tolerant.

    -If you were to test monkey flowers growing on the shore of the lake, you would expect nearly 100% of them to be copper tolerant.

    -The population that existed before mining must have included both copper-tolerant and copper-intolerant plants.

    Source : quizlet.com

    Do you want to see answer or more ?
    James 5 month ago
    4

    Guys, does anyone know the answer?

    Click For Answer