What's the purpose of oxygen rich blood

Which technically is nasa developing that will astronauts reach mars

Which statement about inheritance is true? o girls get most of their traits from their moms, boys get most of their traits from their dads. o male offspring will always have an x-linked genetic disease if the mom is a carrier o fathers always determine the gender of the offspring in humans. o males never have y chromosomes.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?