The scary noise in the scenario in which a little boy is allowed to play with a laboratory rat and shows no fear of it. then,and a scientist makes a scary noise by banging an iron bar whenever the little boy reaches for the rat and because of this the boy begins crying whenever the rat comes near him is <span> unconditioned stimulus.
</span><span> Unconditioned stimulus is a stimulus that naturally, and automatically triggers a response. In this case such stimulus is the noise.</span>
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Verified - To make sure if something is true
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C.)Louisville
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the warm front just moved past them.
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"Old Immigrants" are those moving to the US between 1810 and 1850. These immigrants are similar in that they mostly came to America for the same reason: economic opportunity. Some worked in or started businesses in the major cities.
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Chlorophyll is a green photosynthetic pigment found in plants, algae, and cyanobacteria. Chlorophyll molecules are specifically arranged in and around pigment-protein complexes called photosystems, which are embedded in the thylakoid membranes of chloroplasts.
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