Connecting link between Annelida and Mollusca is

In the origin of life, microspheres are most primitive protobiont, which have a membrane of

$A$ : 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

Theory of special creation was given by

Theory of natural selection was proposed by