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BIO 181 LAB MIDTERM GRAND CANYON
UNIVERSITY 2025 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
BIO 181 LAB MIDTERM GRAND CANYON
UNIVERSITY 2025 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.
, 2 | Page
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
