BIO 139 KCTCS PRACTICE SOLUTION SET
2026 COMPLETE QUESTIONS AND
ANSWERS GUARANTEED TO PASS
●● observation.
Answer: act of viewing the world around us
●● question.
Answer: made based off of an observation
●● hypothesis.
Answer: a tentative explanation for an observation
●● controlled experiment.
Answer: - test several groups
- introduce a single variable per treatment
- keep conditions as similar as possible from one group to the next
●● conclusion.
Answer: supports/refutes hypothesis
- more experimentation needed if refuted
,●● prediction.
Answer: a guess of what might happen based on observation-- the
outcome you would observe if your hypothesis was supported
●● theory.
Answer: a sound explanation of the world supported through continued
observation and experiments over a long period of time
●● 3 components of a controlled experiment.
Answer: 1. variable
2. test group
3. control group
●● variable.
Answer: feature of an experiment that is changed from one treatment to
the next
●● test group.
Answer: exposed to variable in an experiment
●● control group.
Answer: not exposed to the variable in an experiment
, ●● importance of test group & control group.
Answer: they allow researchers to determine whether the variable in an
experiment has an effect
●● independent variable.
Answer: manipulation performed on the test group
(ex. hours of tutoring)
●● which axis is the independent variable found on a graph?.
Answer: x-axis
●● dependent variable.
Answer: effect that is being measured
(ex. test score)
●● which axis is the dependent variable found on a graph?.
Answer: y-axis
●● theory of evolution.
Answer: set of hypotheses that provide a powerful explanation for both
biological observations & the diversity of life
2026 COMPLETE QUESTIONS AND
ANSWERS GUARANTEED TO PASS
●● observation.
Answer: act of viewing the world around us
●● question.
Answer: made based off of an observation
●● hypothesis.
Answer: a tentative explanation for an observation
●● controlled experiment.
Answer: - test several groups
- introduce a single variable per treatment
- keep conditions as similar as possible from one group to the next
●● conclusion.
Answer: supports/refutes hypothesis
- more experimentation needed if refuted
,●● prediction.
Answer: a guess of what might happen based on observation-- the
outcome you would observe if your hypothesis was supported
●● theory.
Answer: a sound explanation of the world supported through continued
observation and experiments over a long period of time
●● 3 components of a controlled experiment.
Answer: 1. variable
2. test group
3. control group
●● variable.
Answer: feature of an experiment that is changed from one treatment to
the next
●● test group.
Answer: exposed to variable in an experiment
●● control group.
Answer: not exposed to the variable in an experiment
, ●● importance of test group & control group.
Answer: they allow researchers to determine whether the variable in an
experiment has an effect
●● independent variable.
Answer: manipulation performed on the test group
(ex. hours of tutoring)
●● which axis is the independent variable found on a graph?.
Answer: x-axis
●● dependent variable.
Answer: effect that is being measured
(ex. test score)
●● which axis is the dependent variable found on a graph?.
Answer: y-axis
●● theory of evolution.
Answer: set of hypotheses that provide a powerful explanation for both
biological observations & the diversity of life
