Examlex
Ecosystems are characterized by the exchange of _________ and ____________ between their organisms and their environments.
Stimulant
A substance that increases activity in the body or brain, often leading to enhanced alertness, energy, or physical performance.
Heroin
An opioid drug derived from morphine, highly addictive, and used illicitly for its euphoric effects.
Cocaine
A powerful stimulant drug derived from the leaves of the coca plant, often used recreationally and known for its potent addictive properties.
Morphine
A potent opiate analgesic drug derived from the opium poppy, used to relieve severe pain.
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