Coacervates are

$A$ : Sometimes, some babies have a small tail.
$R$ : This is just a type of mutant variety

The early stage human embryo distinctly possesses

$A$ : Many countries have banned the use of antibiotics in the cattle feed.
$R$ : Dairymen give antibiotics in the feed to the cattle and it becomes breeding grounds for the antibiotic resistant bacteria

Connecting link between ape and man is