Why do you think size would make a difference in the ability of some species of forams to survive?
There is a difference between the size of forams found in the Cretaceous and Tertiary periods. The ones found from the Cretaceous period were big, and the ones found from the Tertiary period were small. Between these two periods, a giant asteroid hit the earth, causing a mass extinction. How did the small ones survive but the large ones not?

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.