Which of the following is true about groundwater?
a groundwater is the biggest fresh water reservoir on earth.
b) when the rate of pumping is greater than the rate of infiltration, shallower wells may run dry.
c) there is more water stored in groundwater than in all earth's lakes and rivers combined.
d all of the above

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.