Which statement correctly describes the function of each lichen part? a. algae provide structure, bacteria provide food, and fungi provide nitrogen. b. algae provide nitrogen, bacteria provide food, and fungi provide structure. c. algae provide food, bacteria provide nitrogen, and fungi provide structure. d. algae provide food, bacteria provide structure, and fungi provide nitrogen.

Option C, Algae provide food, bacteria provide nitrogen, and fungi provide structure

Explanation:

A lichen is an association of  algae, fungi and bacteria in such a way that they dwell together thereby forming a symbiotic association where all the co-living species benefit from each other.  

Fungi provide the structure as they form the thallus of the lichen and provide space for  both the bacteria and algae to live along with fungi  

Fungi are heterotrophs and hence they can not prepare food of their own. They depend on autotrophic organisms like algae (which posses chlorophyll) which are able to produce food of their own. Bacteria (Cyanobacteria) provide additional nutrient in the form of nitrogen for better nourishment of  all the organisms in the association

Hence the option C is correct.

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]

where is the scientific experiment?