John and his family follow a diet plan that consists of healthy foods. if they begin to gain weight, they eat only protein until their weight drops to where they want it to be.
b.
shannon and shandra watch their weight carefully. they eat diets with no fat or sweets. because of their plan, they stay very thin.
c.
andrew is a wrestler and needs to stay at a consistent weight. in order to do so, he follows the dietary recommendations of a dietician carefully and always maintains a balanced diet.
d.
maria and her brother jose are obsessed with their appearance. in order to maintain a super-skinny look, maria eats a low-calorie, no-fat, high-protein diet. in order to stay bulked up, jose eats all protein and fats.

Which of the following best reflects what we know about how the flu virus moves between species? a) the flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.b) a flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.c) an influenza virus gains new sequences of dna from another virus, such as a herpesvirus; this enables it to be transmitted to a human host.d) an animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates, the virus is passed to a new species such as a bird, and the virus mutates again and can now be transmitted to humans.