Which statement identifies the central idea of the text? it will be impossible for humans to ever determine if hydras are truly immortal, as the experiment would outlast the experimenter
While hydras aren't necessarily immortal, they do have surprisingly long lives and don't age
While Martinez didn't believe hydras to be immortal at first, he has come to realize that they are through his studies
Hydras ability to live long and ageless lives is changing how scientists define what it means to be immortal