Three organisms have four shared characteristics. They all have a backbone and scales, lay eggs, and walk on land. What can be determined based on this information alone? They are members of different species. They are members of the same species. Their common ancestor has the same four shared characteristics. Their common ancestor has none of the shared characteristics.

According to the cladogram, which organisms have roundworms as a common ancestor?

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 is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.