The foundation for biological evolution or descent through modification is a) changes in gene frequency in a population occur from one generation to the next. b) mutation, migration, genetic drift, and natural selection cause biological evolution. c) all living things are made of one or more cells. d) organisms adapt to changes in their environment.

What enzyme is most important for dna replication and why?

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.

Which of the follow describes a disadvantage secondary sources have compared to primary sources?