Which of the Following Constitutes a Controlled Experiment

question 35

Multiple Choice

Which of the following constitutes a controlled experiment?

• A) using a microscope to observe organisms present in a sample of pond water and recording the number of each type of organism observed
• B) setting up a bird feeder and compiling a list of all of the bird species seen at the feeder over a period of several weeks
• C) growing one set of ten seedlings under white light and one set of the same type of seedlings under red light and measuring their growth over a period of two weeks
• D) growing one set of ten seedlings under white light at 30°C and one set of a different type of seedlings under red light at 25°C and measuring their growth over a period of two weeks

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Definitions:

Interdependence

A relationship between individuals or groups that is mutually reliant, where actions of one party impact the other.

Human Experience

The broad range of events, emotions, and activities that encompass what it means to be human.

Clinical Trials

Research studies performed in humans that are aimed at evaluating a medical, surgical, or behavioral intervention.

Metabolism

The complex set of life-sustaining chemical transformations within the cells of living organisms, involving the conversion of food to energy, elimination of nitrogenous wastes, and synthesis of cellular materials.