For most prokaryotes, they do not contain a nucleus.
The correct answers would be :
A) cell membrane
C) cytoplasm
D) DNA
E) ribosomes
The answer is A. Decreased pH levels. A substance having a pH value less than seven is considered to be acidic. Increases in the concentration of these gases from the use of fossil fuels leads to more acid precipitation, lowering the pH of aquatic environments. Plant life and soil can also be affected by acid rain. Buildings and other infrastructure can be damaged.
Answer: They must be randomly chosen, meaning that each member of the larger population has an equal chance of being chosen. They must be large enough so as not to skew the results. The optimal size of the sample group depends on the precise degree of confidence required for making an inference. Simple random sampling is the basic sampling technique where we select a group of subjects (a sample) for study from a larger group (a population). Each individual is chosen entirely by chance and each member of the population has an equal chance of being included in the sample.
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