1 Some DMMs can simultaneously measure and display the ac and dc components of a signal. 2  The DMM display can show results three ways (see illustration below): 3  The ac portion of the signal appears in the primary display and the dc portion in the smaller secondary display.
Each lichen specie is one alga species plus one fungus. The alga, a microscopic green plant, makes the food for the duo, while the fungus, a non-green plant, gives the pair support and soaks up moisture.
The lichen combination of fungus with algae and/or cyanobacteria has a very different form (morphology), physiology, and biochemistry to the component parts growing by themselves.ichens are said to be species, but what is meant by species is different from what is meant for plants, animals, and fungi, for which species implies a common ancestral lineage. Lichens are really combinations of species from two or three different biological kingdoms, so there is no common lineage.