Thanks, Developmental Bio Textbook!
"The amoeba and the paramecium are potentially immortal... But for Volvox, death seems to be as inevitable as it is in mouse or in a man. Volvox must die as Leeuwenhock saw it die because it had children and is no longer needed. When its time comes it drops quietly to the bottom and joins its ancestors. As Hegner, the John Hopkins zoologist, once wrote, 'This is the first advent of inevitable natural death in the animal kingdom and all for the sake of sex.' And he asked, 'Is it worth it?' "
-Joseph Wood Krutsch