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.
1. A lichen is a combination of fungus and algae that lives on the sides of trees, rocks, and other materials.The fungus provides the algae with water and minerals and the algae uses the water and minerals to make food for both organisms.What type of relationship does the lichen represent?. A lichen is a combination of fungus and algae that lives on the sides of trees, rocks, and other materials.