Examlex
Prior to the discovery of radioactivity in the late ______ century,geologists were able to develop a(n)____________________ geologic time scale.
Chemotherapy
A type of cancer treatment using drugs to kill cancer cells or slow their growth.
Psychedelic
Refers to substances that produce altered states of perception and consciousness, often used in the context of certain drugs.
Marijuana
A psychoactive drug from the Cannabis plant, used for medical or recreational purposes.
Circadian Rhythm
The natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.
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