Instead of using a representative sample to determine the size of a population, why not just count the individuals to determine the total number?

What is the similarities and differences between bacteria and eukaryote?

In which of the following relationships is one organism always benefited while the other organism is always harmed

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.