Mice that have been given morphine are very likely to develop blood poisoning because bacteria that normally reside in the intestine typically respond to morphine by migrating into the bloodstream. however, when mice are given both morphine and the new drug naltrexone, blood poisoning is much less frequent, although it does still occur. these results provide support for researchers’ prediction that naltrexone will turn out to be toxic to certain types of bacteria. which of the following, if discovered to be true, would most seriously weaken the support for the researchers’ prediction? a. after being administered to mice, naltrexone does not pass from the bloodstream into the intestine. b. naltrexone inhibits morphine from triggering the migration of intestinal bacteria into the bloodstream. c. mice that have been given naltrexone but not morphine have no greater risk of developing blood poisoning than do mice that have not been given either substance. d. the increased risk of blood poisoning is not the only harmful effect on mice of being given morphine. e. conditions other than the presence of intestinal bacteria in the bloodstream can cause blood poisoning in mice.

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

What is the correct answer for the process of water eroding soil? rills, sheet erosion, gullies sheet erosion, rill, gullies gullies, rills, sheet erosion sheet erosion, gullies, rills

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.