Hypoplastic left heart syndrome
Our body needs Vitamin B9 or folic acid for the synthesis, repair, and methylation of DNA.
Folic acid is highly recommended for women of childbearing age to prevent spinal cord and neural tube defects. It is required for the development of the nervous system of an unborn baby.
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The law of conservation of mass, states that the total atoms making their respective elements in compounds are equal on both sides of the reaction. The total mass of the reacting molecules equals the total mass of the product molecules that have been formed.
To answer this question we need to analyze each available option:
A. An angiogram. Is a procedure used to obtain x-ray images showing blood vessels of the heart as well as blood flux. So this is the correct answer.
B. Electroencephalogram. This is a study of the cerebral function based on its electric activity. So this cannot be.
C. Amniocentesis. Refers to a pregnancy test to diagnose genetic disorders in a fetus, using amniotic fluid, so this cannot be either.
D.. An echogram, which refers to an image created by sound waves of high energy, is an ultrasound so this cannot be.
The half-life of carbon-14 is equal to 5730 years. The amount of substance with half-life h at any time t is equal to,
At = (Ao) x (1 - 0.5)^(t/h)
Substituting,
At/Ao = 0.67 = 0.5^(t/5730)
The value of t from the equation is 3310.6 years.
