How many steps does the scientific method have in classic form?
5
3-4
2
6
5
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Which piece of evidence would best support the notion that aggressiveness involves a biological component in humans?
A) Across many cultures and classes, boys are consistently more aggressive than girls. B) Some tribes show evidence that aggression among them is virtually nonexistent. C) One particular culture can be peaceful for hundreds of years and then become aggressive due to changes in their living conditions. D) Kuo (1961) raised a kitten in the same cage as a rat, and the cat grew up refusing to chase or kill any rat it encountered. E) Within a culture, aggression is generally exhibited in the same way.
A chemical substance that circulates throughout the brain and travels a relatively long
distance to influence the activity of neurons is called a(n) a. neurotransmitter. b. synaptic ion. c. neuromodulator. d. enzyme. e. neuroeffector.