WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
5th Edition
ISBN: 9781319272531
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 1, Problem 6MC
Summary Introduction
Introduction:
Variables are the various conditions that are present in a study (such as the treatment given).
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An independent variable is…
Select one:
typically not included in controlled experiments
Factor being manipulated
factor showing response
variable held constant during an experiment
Why the results of the Swan-neck flask experiment were reliable ?: Select one: a. Because it maintained no controls at all b. Because proper controls were maintained and only one variable changed at a time c. Because many controls were maintained d. Because it was repeatedly done by several scientists e. Because it tested all variables at the same time
A well-designed experiment will contain both positive and negative controls. Which of the following is a false statement?
Choose one from the following:
(A) a positive control experiment is missing some of the components of the experiment and should give a negative result
(B) a positive control experiment contains all of the components of an experiment and should give a positive result
(C) a negative control experiment is missing the element being tested and should give a negative result
(D) if there are multiple components of an experiment, there should be multiple negative controls
(E) if a negative control experiment give positives results, it is likely that the experiment is contaminated
Chapter 1 Solutions
WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
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Ch. 1 - Prob. 11SACh. 1 - Prob. 12SACh. 1 - Prob. 13SACh. 1 - Prob. 14SACh. 1 - Prob. 15SACh. 1 - Prob. 16SACh. 1 - Prob. 17SACh. 1 - Prob. 1MCCh. 1 - Prob. 2MCCh. 1 - Prob. 3MCCh. 1 - Prob. 4MCCh. 1 - Prob. 5MCCh. 1 - Prob. 6MCCh. 1 - Prob. 7MCCh. 1 - Prob. 8MCCh. 1 - Prob. 9MCCh. 1 - Prob. 10MCCh. 1 - Prob. 11MC
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- Which of the following is not mentioned by Marder (2011) as a category of experimental research? A. Developing a mathematical model of a biology process B. Measuring a value C. Measuring a relationship between variables D. Using computers for analysis E. Improving and industrial productarrow_forwardThe 'control group' is an essential component of an experiment. This is because 1. A control group allows one to determine if a particular result is due to the experimental variable. 2. No, it's not essential in experimentation. A control group is not always necessary it depends on the experiment. 3. A control group allows for multiple variables to be tested at the same time. 4. A control group is required for the development of a prediction.arrow_forwardI answered with a and c but keep getting told its the wrong answer. Which of the following is not a component of effective experimental designs in the early stages of a scientific study? Select one or more: a. small sample sizes b. experimental groups taking a placebo c. double blind experiments d. short duration e. animal models f. repetitive testingarrow_forward
- The following are reasons why randomized control trials (RCTs) are not used to investigate all research questions, except: a. RCTs can be expensive, which can make it difficult if funding is limited b. RCTs can be time-consuming, and it may take months and sometimes years to obtain final results c. For certain research questions and/or certain types of exposure variables, it may not be ethical to conduct an RCT d. RCTs are less valid than observational analytical study designsarrow_forwardWhich of the following is an ethical consideration when using animals in research? a. Avoiding exposing them to unnecessary pain. b. Animals cannot be killed during the course of an experiment. c. Animals must not experience any pain during an experiment. d. There are no ethical considerations when using animals in research.arrow_forwardA standardized variable is… Select one: variable held constant during an experiment factor showing response factor being manipulated typically not included in controlled experimentsarrow_forward
- A scientist is curious about the effects of diet on the gut length of spadefoot toad tadpoles. She collects tadpoles from pools and dissects them to determine the length of their gut and their diet. This study is…. Group of answer choices A. observational because she is not manipulating an independent variable B. possibly the most boring thing I have ever read C. experimental because she is doing it in the lab D. observational because she is doing it outside E. experimental because she is controlling the independent variablearrow_forwardExplain the differences between independent, dependent and controlled variables in an experimentarrow_forward(1 question with multiple steps please answer) Identify the component characteristics of a scientific investigation Suggest alternative hypotheses that could be tested by the design Evaluate the validity of conclusions based on the given results Suggest ways to improve the experimental design Define and recognize examples of the experimental group, experimental variable, control group, control variable, independent variable, and dependent variable, and dataarrow_forward
- Explain why we need to control variables that are not being tested in an experiment?arrow_forwardWhy is it important to have a control for an experiment?arrow_forwardDrug A is being tested for its effectiveness in easing menopause symptoms. In designing an experiment to test Drug A, which of the following would be a valid approach? a. Participants can choose whether to be in the experimental or control group. b. The experimental group will contain only females and the control group will contain only males. c. Unlike the experimental group, the control group should include subjects whose age is above 52 years. d. The experimental group will receive Drug A and the control group will receive a placebo.arrow_forward
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