The tight coiling and looping of the glomerular capillaries is functionally important, because it:
a. provides increased surface area for filtration
b. allows for more efficient reabsorption of water
c. provides smaller distance for diffusion
d. causes a decrease in gfr

(The correct option is A) Provides increased surface area for filtration.

Explanation:

Glomerular capillaries is known as a network of small blood capillaries which is called as a tuft, and situated at the starting of a nephron which is present in the kidney.

Through the glomerular filtration barrier, the blood is filtered across the capillary walls of the tuft, which helps to yield it's filtered of soluble substances, and water to a Bowman's capsule (cup like sac). Then filtered enter to the renal tube of the nephrons.

Glomerular capillaries important function is to provide increased surface area for filtration. So, the correct option is A.

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]

a compound light microscope is used to magnify objects in steps.  

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