How do scientists know that extinction has been a common event throughout earth's history?

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.

Being prepared to play is an important step in staying safe when participating in a game. select the best answer from the choices provided. t f

Lilia is managing her high blood pressure. which type of technology could she use to her with this task? an automated blood pressure monitor at the grocery store an app that allows her to write her own prescriptions an emergency nurse hotline with available 24 hours a day a satellite urgent care clinic connected to her medical records