Which statement is true about the turbine in a hydroelectric dam? a. It is turned by wind and provides a direct current. b. It i
s turned by water to produce a direct current. c. It is turned by water to turn a wire inside a magnet. d. It is turned by wind and provides an alternating current.
Option C, It is turned by water to turn a wire inside a magnet.
Explanation:
In a hydroelectric power plant, the water is stored and then releases from greater heights which produce force enough to turn the turbine. These turbine then activates a generator to produce electricity. With in the generator a wire is set between two magnets , which start rotating to produce AC current.
Electricity produced by rotating wire fixed between the magnets is always an AC current. Therefore option B is incorrect.
Option A and D is incorrect as in producing hydroelectric energy it is the water which is used to rotate the turbine and not the wind. Also only AC current is produced by the hydroelectric dam.
Mutations are spontaneous variations to nucleotide sequences, therefore in two animals or two chromosomes they can not be identical by nature. Therefore, the introns interact with non-coding sequences and therefore their sequences are not established as consensus in nature and are therefore highly prone to mutations.
Answer: Option A is correct. They eat consumers which ate plants, which absorb it from soil.
Explanation:
Carnivores get nitrogen from the food they eat or consuming nitrogen from the small insects trapped in plant. They eat consumers which in turn eat plants and absorb nitrogen from the soil.
