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Hundreds of cities in throughout China are the fountainhead of the Yangtze River's pollution, and across the last <em>50</em> years, it has been an increase of 73% in pollution volume in the nucleus of the river, through sewage and industrial waste dumping.
Ironically enough, since the Yangtze river was often referred to as “<em>the source of life</em>” in China; due being home to <em>350</em> fish species, and accounting for a significant sum of China’s water resources for rice and fishery production as well as a big part of the nation’s GDP, while being a center of great biological wealth.
Answer: This is a "CONTROLLED PLACEBO EXPERIMENT".
Explanation: A controlled placebo experiment is a type of research method that is used to check the effectiveness of a drug in a patient. This is done by selecting a sample group, then randomly divide the two group into a placebo group ( this are the group that will receive the drug treatment ) and the controlled group( these are the group that will receive a coloured mixture that looks like the drug, but does not have any effect). Without the groups knowledge about the real drugs and the coloured mixture, but are followed up and tested.
This is a controlled placebo experiment, because 400 student has been choosed as the sample, and are divided into a placebo group and a controlled group, to check the effectiveness of a drug on their memory.
The answer is (D).To strictly limit the amount of time a person can remain politically active
Answer:
Psychobiology
Explanation:
Psychobiology is the science that focuses on studying the psychology of individuals based on their biological functions. In other words it deals with the interactions between biology (neurological system, neurotransmitters) and their effects on the individual behavior.
Therefore, an individual working in psychobiology might study the effects of drugs (biological) or try to explain behavior based on chemical activities in the nervous system (explaining behavior based on biology)