A sample is a smaller group of members of a population selected to represent the population. ... It requires that every possible sample of the selected size has an equal chance of being used. A parameter is a characteristic of a population. A statistic is a characteristic of a sample.
Groundwater contamination occurs when man-made products such as gasoline, oil, road salts and chemicals get into the groundwater and cause it to become unsafe and unfit for human use. Materials from the land's surface can move through the soil and end up in the groundwater. That is why pollution can contaminate an aquifer.
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Answer:
C. All living organisms have the same four nitrogenous bases in common with each other.
Explanation:
Because all living organisms have the same 4 nitrogenous bases in common with each other but different sequences.
