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BIO 181 LAB MIDTERM GRAND CANYON
UNIVERSITY UPDATED ACTUAL EXAM
WITH CORRECT SOLUTIONS.
What is a hypothesis? - correct answer- - A tentative explanation thetas given and can be tested.
- Predictions that can be tested by conducting observations or
by performing experiments.
What is a null hypothesis? - correct answer- - Is a default assumption that an explanation or prediction is false.
What is an alternative hypothesis? - correct answer- - Is the alternative explanation to the null hypothesis thetas accepted as a best explanation if the null hypothesis is rejected.
What is a dependent variable? - correct answer- - The elements measured or counted by an investigator in response to a change in an experiment as a result of a change in the independent variable.
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What is an independent variable? - correct answer- - The variable that drives/manipulates a change in the dependent variable. the investigator assumes that experimental outcomes can be predicted and even changed by changing/manipulating an independent variable.
What is an experimental group? - correct answer- - The section of the experiment involving manipulation of an independent variable.
What is the control group? - correct answer- - The section of the experiment in which an independent variable is omitted or set a standard value. The control group helps to evaluate how the manipulation of the independent variable affects the outcome of the experiment.
Why is it important to formulate a hypothesis? - correct answer-
- It involves suggesting possible answers to proposed scientific
questions in a predictive and explanatory form.
What are the five steps in the scientific method? - correct answer- 1) Making observations 2) Formulating a hypothesis 3) designing an experiment to test the hypothesis 4) Presenting and analyzing results
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