al showed that the Enchondrus snail was able to fertilize the soil in the Negev Desert because it (*) fed on these organisms, which provided nitrogen.
In the Southern Hemisphere, the presence of usnic acid causes these organisms to assume a different colour. The k-spot test can be used to differentiate stictic acid derivatives called depsidones produced by the Parmotrema and Menegazzia genuses of these organisms. These organisms can reproduce by small, branchy outgrowths called isidia or through tiny granules known as soredia. Jones et. al showed that the Enchondrus snail was able to fertilize the soil in the Negev Desert because it (*) fed on these organisms, which provided nitrogen. An additional layer of lower cortex is present in the free-standing form of these organisms, while another form uses rhizinae for attachment. Their main body, called the thallus, comes in crustose, fruticose and foliose forms and, due to their sensitivity to sulfur dioxide, these organisms are used as an indicator for air pollution. Examples include "old man's beard" and reindeer moss. Composed of a mycobiont and phycobiont, for 10 points, name these organisms, a symbiotic relationship between an algae and a fungus.
In the Southern Hemisphere, the presence of usnic acid causes these organisms to assume a different colour.
lichens