A subset of cases selected from a larger population is called a sample. Samples are chosen to represent the larger population in order to make inferences or draw conclusions about the population as a whole.
Genetic drift.
random.
a random sample
The use of a small number of people to represent a greater population is called sampling. The sample can be randomly chosen so that it is a reliable reflection of most of the population.
e control group
This is called a random sample.
Random Sampling.
A portion of butter is called a Pat of butter
Population is a noun.
This type of natural selection is called stabilizing selection because the mean traits of the population are being selected for against the immediate environment.
The upper portion of a fraction is called the numerator.