If your digital multimeter offers a frequency setting (Hz is the symbol) on the dial: 1  Turn the dial to Hz. 2  First insert the black test lead into the COM jack. 3  Then insert the red lead into the V Ï jack. 4  Connect the black test lead first, the red test lead second.  Read the measurement in the display.
Both systems divided living things into 2 main groups, animal and plants, but aristotses system had 3 sublevels and Linnaeus's had 6. Aristotle divided by habitat and stems and Linnaeus divided by morphology.
The science of naming and grouping organisms is called systematics. In the 1730s, Carolus Linnaeus developed a naming system, called binomial nomenclature. In binomial nomenclature, each species is assigned a two-part scientific name: The first part of the name refers to the genus, or a group of similar species.