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.
Carl Linnaeus in the 18th century. Linnaeus used Latin terms to arrange species according to observable similarities and differences in their physical morphology. With recent innovations in molecular biology, the traditional classification system has been made more precise by the possibility of going beyond superficial similarities and mapping similarities and differences between species at the genetic level.