Why does earth have such a diversity of plant and animal life? give three reasons.

1) The climate of the area can effect the way plants grow, and animals live.
2) For plant diversity it would be because of cross pollination. For animals it would be because of cross breeding.
3) And lastly, because of the wondrous way God made the world.  

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy