Benedicts reagent is an indicator for the presence of in solution.
a) sugars
b) proteins
c) amino acids
d) polyunsaturated fatty acids

Sugars

Explanation: The sugars give a positive test for Benedict's reagent. This is a chemical reagent made by the mixture of sodium carbonate copperII sulfate pentahydrate and sodium citrate.

When Benedict's solution is put into the sample containing reducing sugars then the color of the solution changes from blue to brick red.

Application:For detecting the pressence of sugar in urine.

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.