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.
Historical records show that informally classifying organisms took place at least back to the days of Aristotle (Greece, 384â322 BC), who was the first to begin to classify all living things. Aristotle used a very simple system of classification. He divided all living thing into two groups: plant and animals. Some of the terms he gave to animals, such as  invertebrates  and  vertebrates  are still commonly used today.