Which sentence is an example of how a scientist might use a model? Microscopes are used to magnify a group of cells on sets of slides. Stopwatches measure the amount of time it takes for runners to complete a mile. Marbles placed inside a hollow sphere are used to describe protons in a nucleus. A wrench is used to tighten a nut onto a piece of wood.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

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.