Examlex
Which concept helps to explain why close relatives have a varied mix of genetic traits?
Stimulant
A substance that raises levels of physiological or nervous activity in the body, commonly used to enhance alertness, attention, and energy.
Amphetamines
A class of stimulant drugs that increase activity in the brain and have effects such as increased energy and alertness.
Mescaline
A hallucinogenic drug derived from certain cacti, notably the peyote cactus.
Stimulants
Drugs that speed up activity in the central nervous system.
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