AP Biology: Experimental Design

Front

What is an independent variable?

Back

The variable that the experimenter changes or controls, assumed to have a direct effect on another variable.

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What is a dependent variable?

Back

The variable that is measured in an experiment, which is affected by the independent variable.

Front

What is the control group in an experiment?

Back

The group that does not receive the experimental treatment and is used as a benchmark to measure how the other tested subjects do.

Front

What is the purpose of a hypothesis in an experiment?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.

Front

What does it mean to delete genes in a genetic experiment?

Back

It refers to the process of removing specific genes to study their effects on traits, such as insecticide resistance.

Front

What is the role of a control strain in genetic experiments?

Back

A control strain is used to compare the effects of genetic modifications against a baseline.

Front

What is the significance of trichome density in plant-herbivore interactions?

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Trichome density can affect herbivore feeding behavior and plant defense mechanisms.

Front

What is the relationship between starch, water, and glucose in a biological context?

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Starch is a storage form of glucose, and water is essential for photosynthesis, which produces glucose.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What factors can affect the rate of photosynthesis?

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Light intensity, carbon dioxide concentration, temperature, and the presence of functional organelles.