Multiple sclerosis develops when nerve cells in the brain and spinal cord lose the insulating mylien sheaths that surround them.This can happen anywhere in the CNS and is random.
Symptoms are Muscle weakness, loss of sensory input from the skin and other areas, poor vision and mental problems due to the loss of the protective mylien the neurons stop conducting the impulses and hence there is a loss of functions controlled by the areas of the CNS concerned.
Hope this helps! :)
Radiometric dating is a kind of technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.
The answer will obviously be letter A
The half life of Carbon 14 is 5730 years. By substituting the given figures to the formula x=I(1/2)^n where x is the amount of the remaining material, I is the initial amount and n is the quotient between the time elapsed and carbon 14's halflife. You will arise with the formula x=20(1/2)^1.745. You will get 5.97 mg.
