A student observes a plant bending toward a light source. What is the best explanation for this behavior?
Correct!
Wrong!
Phototropism is a growth response of a plant toward or away from light.
If a cell is placed in a hypertonic solution, what will most likely happen to the cell?
Correct!
Wrong!
Water moves out of the cell in a hypertonic solution, causing it to shrink.
Which conclusion is best supported by the discovery of fossils with similar bone structures in different species?
Correct!
Wrong!
Homologous structures suggest a common ancestry among species.
Why is it important to have a control group in a biological experiment?
Correct!
Wrong!
A control group allows comparison to determine if the variable had an effect.
A scientist finds that changing the pH of a solution stops an enzyme from working. What is the most logical explanation?
Correct!
Wrong!
Enzymes are sensitive to pH and can denature if the environment changes.
If a genetic mutation occurs in a somatic (body) cell, what is the likely result?
Correct!
Wrong!
Mutations in somatic cells affect the individual but are not passed to offspring.
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Which is the most reasonable hypothesis if two closely related species show different traits?
Correct!
Wrong!
Traits may vary due to different environmental pressures or mutations.
A researcher notices bacteria grow faster in warm temperatures. What is the best next step?
Correct!
Wrong!
Scientific thinking requires forming a hypothesis and testing it under controlled conditions.
Why do biologists repeat experiments multiple times?
Correct!
Wrong!
Repetition increases reliability and helps identify patterns or errors.