Cancer is a disease that involves uncontrolled cell division caused by a genetic mutation. it can occur in almost any region in the body. so, cancer is essentially uncontrolled (a. meiosis b. mitosis c. regeneration) of (a. enbryonic stem cells b. gamete cells c. specialized cells).

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.