If You Were Going to Study the Effects of a Certain

question 12

Multiple Choice

If you were going to study the effects of a certain fertilizer on plant growth, which list of variables would you most likely want to control (keep constant) ?

• A) Plant type, soil type
• B) Plant type, soil type, water, light
• C) Plant type and fertilizer
• D) Fertilizer, soil type, water, light
• E) Fertilizer, soil type , water, plant type

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Definitions:

Battle Fatigue

An outdated term for what is now often referred to as PTSD, related to psychological distress from combat.

Shell Shock

An outdated term once used to describe the psychological trauma experienced by soldiers during war, now understood as a form of post-traumatic stress disorder (PTSD).

Type A Personality

A personality type characterized by high levels of competitiveness, self-urgency, hostility, and a constant sense of time pressure.

Heart Disease

A range of conditions that affect the heart, including coronary artery disease, arrhythmias, heart valve problems, and heart failure.