Answer in one word or one phrase : 1. What colours early people used to make paintings on cave walls? 2. How many years ago, major changes in the environment took place 3. At which palaeolithic site in Deccan, a variety of tools were found ? 4. At which site ostrich egg shells are found in Maharashtra ? 5. Which age Bhimbetka site in Madhya Pradesh belong to? Answer these questions briefly :
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Research conducted among smokers has shown that cigarette smoking (or nicotine administration) has several benefits, including modest improvements in vigilance and information processing, facilitation of some motor responses, and perhaps enhancement of memory131"133.
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