Concept explainers
a.
To identify: The control and experimental groups in the mouse camouflage experiment.
Introduction: Experiments are designed to test the hypothesis. The data obtained from the experiments are often represented in the form of graph for easy comparison and analysis. Experiments and data analysis are part of scientific methods to test a good hypothesis.
b.
To identify: Independent variable and dependent variable.
Introduction: There are two types of variables in a controlled experiment that include independent and dependent variables. Independent variables are the ones that can be exploited by the researcher and that affect the dependent variables. Dependent variables are measured by the researchers.
c.
To explain: The reason why the results of the study is measured as the proportion of the attacks by the predator on the two different coat colored mice camouflaged in the two different colored surfaces, respectively, instead of the total number of attacks by the predator on the non-camouflaged mice.
Introduction: Variables of the experiment are qualitative and quantitative measures that include traits, conditions, or factors.
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
Study Guide for Campbell Biology
- The table below contains results from an experiment comparing the response time of individuals to an auditory and visual prompt. Compare the results using a t-test and determine if there is a difference between the two tests. If you detected a difference what do you think is responsible for that difference? Visual Auditory 0.599 0.402 0.4575 0.296 0.178 0.135 0.5895 0.235 0.502 0.208 0.214 0.216 0.4457 0.200 0.485 0.224 0.399 0.25 0.462 0.288 0.283 0.210arrow_forwardExplain why does only male mice used for testing behavioral studies, why not include the female mice and it is important to use both sex of mice for behavioral studies?arrow_forwardPlease make your response short. Thanks! Discuss what the difference between q and q2 means for Hardy Weinberg equilibrium using fur color in your discussionarrow_forward
- An early study found that postal workers who worked in the office had higher rates of coronary heart disease than those who delivered mail on foot. The investigators concluded that physical activity is inversely related to risk of developing coronary heart disease. Sceptics disagreed, pointing out that the postal clerks were older than the postal carriers, and that age is a risk factor for coronary heart disease. This argument highlights the possible role of: -Chance? -Selection bias? -Recall bias? -Confounding?arrow_forwardWhat is the difference between the experiment's control group and controlling for confounding variables?arrow_forwardWas the control group valid in the Tuskegee study? Why yes or why not? Can you please help me with this questionarrow_forward
- Look at the two graphs in Figure 52-21. In which experiment did the parentals in the experimental group guard the eggs more closely? In which experiment did the experimental parentals guard the young more closely? Account for these differences.arrow_forwardSuppose you want to examine the effect of a fertilizer on the size of eggplant produced, and therefore, you need to establish the experimental and control groups. A. What could represent the control group? B. What will be your experimental group? C. What will be the best way to establish a relationship between your two variables?arrow_forwardA. What is the effect of temperature on the frequency of cricket chirping? B. What is the effect of humidity on the frequency of cricket chirping? 1. Complete two hypotheses below using one these increases/decreases/stays the same, one for each question (A & B) above:A: As the temperature increases, the frequency of chirping __________ B: As the humidity increases, the frequency of chirping __________ 2. Independent variable: 3. Dependent variable: 4. Controlled variables (at least 3):a.b.c 5. Control Treatment: 6. Data Table Temperature Humidity Number of Chirps9 30 209 68 209 85 2014 85 2419 85 2824 85 358. Plot your data above as bar graph: a. Which variable is plotted on X-axis? b. Which variable is plotted on Y-axis? 7.…arrow_forward
- I expect for genetically identical animals that have been reared in similar conditions to have a smaller SD for any parameter that I decide to measure compared to genetically diverse animals that have been grown in a variety of natural environments.arrow_forwardColton is having an ant problem at his house and heard that adding more cinnamon throughout his home may repel and reduce the number of ants that enter. He wants to design an experiment to determine the relationship between cinnamon and ants. What is the best testable research question for Colton's experiment? A. How does the number of ants entering a home change throughout the day? B. What spices affect ants? C. Do ants like cinnamon? D. How does the amount of cinnamon in a home affect the number of ants entering? What's the independent variable/Dependent variable/ controlled variable?arrow_forwardYou observe some bark beetles with different feeding behaviors. You find that the behavioral phenotypes you observed are closely associated with the following genotypes. genotype phenotype number observed BB feeds under bark 60 Bb feeds on top of bark 24 bb feeds on leaves 16 a) What are the allele frequencies and the expected number (out of 100 beetles) of genotypes? b) Calculate the Chi-Squared value (c2). Then look up the p-value only using this Chi-squared calculator: https://www.mathsisfun.com/data//chi-square-calculator.html Clear all the values in the box at upper right, enter the Chi Square value that you obtain FROM YOUR CALCULATIONS in the Chi-Square box, and enter 1 for the degrees of freedom. Is the population in H-W equilibrium? c) If you answered “No” to b): Provide at least three biologically valid reasons why the observed beetle population may not be in equilibrium. If you answered “Yes” to b): Why do you think this…arrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning