<span>Some do and some do not. One cannot always isolate all of the variables, which may only allow a conclusion of correlation (coexistence), which is not the same as cause and effect. If one can observe that a condition only exists following some other condition, to the exclusion of all other potential causes, then cause and effect can be established.
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Concurrent powers is power that is shared for example there is the power to borrow money, the power to build roads etc..
IT depends on were the limit is adn how much they are limited
Answer:
Motor neurons stimulate muscles to contract.
