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Is litmus a natural indicator?
litmus is a natural indicator because it is obtained from a natural source e.g. lichens mainly roccella tinctoria.it is not synthesized in the laboratory.
How do litchens survive?
Litchen is a dual organism which is made up of fungus and alga, Associated in a mutually beneficial association. Litchen grows where there are some pollutants. Sometime also referred to as pollution indicators. They survive on presence of pollutants, more the pollutant more the litchen and vice versa.
How do plants dissolve rock?
Plants can weather rocks by having its roots grow, often squeezing the rock into so many little pieces, it can technically be considered "dissolved".
How do lichens multiply?
A lichen-forming fungus controls the process of association with its algae (that combine with fungi to form lichens) . This association is basically parasitic (the algae are to some extent transformed and even killed by the fungus (form a kingdom distinct from "true plants" in that they lack chlorophyll and thus must find food as animals do, accomplishing this either by living on dead organic materials or on living organisms as parasites) , which absorbs carbohydrates produced by the algae's photosynthesis), but the fungus also protects the algae from excess light, spreads their surface area, and provides a steadied supply of water without which the algae would die, so "symbiosis" is the typical, stabilized form of their association.
