Is It True That Every Experiment Must Have a Control

question 24

Multiple Choice

Is it true that every experiment must have a control group that does not experience the independent variable?

• A) Yes, a control group that does not experience the independent variable is necessary
• B) Only if you want to have a reliable experiment
• C) Only if you want to have a valid experiment
• D) Control conditions do not always include a level in which the independent variable is absent.

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Definitions:

Osteoporosis

A condition characterized by weakened bones that are more susceptible to fracture, often due to reduced bone mass and density.

Vitamin D Production

The synthesis of vitamin D in the skin under the influence of ultraviolet radiation from sunlight, which is crucial for bone health and immune function.

Respiratory System

The biological system consisting of specific organs and structures used for gas exchange in animals and plants.

Osteoporosis

A condition characterized by weakened bones, making them fragile and more likely to fracture.