Which of the following best describes a controlled experiment? a. An experiment repeated many times to ensure that the results are accurate b. An experiment includes at least two groups, one of which does not receive the experimental treatment c. An experiment that includes one group for which the scientist controls all variables d. An experiment that includes at least two groups, one differing from the other by two or more variables

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

What is the role of the phospholipid belayer in cellular transport in living cells

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.