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(a) What effect does alcohol have on reaction time?
(b) What other short-term effects does alcohol have?
(c) What long-term effects can result from an excessive alcohol intake?
(a) Alcohol increases a person's reaction time (responses are slower).
(b) Alcohol causes vaso-dilation, enhance in self-confidence, reduction of accuracy and, in some people, irresponsible behaviour.
(c) Excessive intake of alcohol over a long period can injure the stomach, liver (cirrhosis of the liver), nervous system and brain. It might also be induce dependence (alcoholism).
Do plants placed under an environment drier than the habitat where they are used to living have a reduction or an increase in the time during which their stomata remain open? I
The trp (tryptophan) operon which is shown in the figure will have five structural genes encoding enzymes for tryptophan biosynthesis with an upstream Ptrp (trp promoter)
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The gene is a distinct portion of a cell's DNA. Genes are coded instructions for making all the body needs, mainly proteins. Human beings have about 25,000 genes. Researchers have
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