Which of the Following Statements About Heavy Metals Is True

question 12

Multiple Choice

Which of the following statements about heavy metals is true?

• A) Their specific gravity exceeds that of water by five or more times.
• B) None of them is necessary to sustain life.
• C) All of them are toxic even at trace levels.
• D) All of these are correct.
• E) None of these is correct.

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Definitions:

Sickle Cell Anemia

A genetic blood disorder characterized by red blood cells that assume an abnormal, rigid, sickle shape, leading to various complications.

Homozygous Dominant

A genetic condition where an individual has two dominant alleles of a particular gene, resulting in the expression of the dominant trait.

Homozygous Recessive

A genetic condition where an individual has two copies of a recessive allele for a particular trait.

Genetic Drift

A mechanism of evolution that involves random changes in the frequency of alleles within a population across generations.