How is a loss of biodiversity most likely to affect an ecosystem? a. by eliminating natural systems that clean air and water b. by causing new sources of medicines ti be gained c. bu increasing its genetic diversity d. by increasing its reliance to chance

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?

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer