After george had a heart attack at age 40, he decided to change his lifestyle. which form of physical activity would best him improve the health of his heart ? a)swim for 20 mins. tuesday and friday; lift weights for 20 minutes monday , wednesday, saturday. b) swim for 20 minutes tues. and friday; run or walk briskly for 30 mins saturday wednesday and saturday c) ride and exercise bike for 20 mins tuesday and friday ; walk leisurely for 20 mins sunday monday wednesday and saturday

Victoria enjoys laughing with her friends as they walk around the track after school which best describes her heart rate during this activity

Which of the following affected by the nerve damage?

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.