Briefly explain the difference between "breath-
ing" and "respiration".

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

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.