while an organism is alive, what happens to its c-14 to c-12 ratio?

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.

What are the student's observations and inferences before he starts his investigation?