When sampling a population, the numbers of organisms are counted within a sample site, and then the results multiplied to estimate the total number in the entire habitat. Large animals and plants can ...

Harnessing a pervasive type of cellular messenger shows early experimental promise as a routine way of sampling and monitoring the body’s response to prescription drug exposure. Purdue University-led ...

Systematic sampling is straightforward and low risk, offering better control. However, it may introduce sampling errors and ...