______ is the process where organisms best suited to their environments survive and reproduce.

Paleontologists study ______.

Differences in traits within a population are called ________.

Microscopic organisms like ______ also go through natural selection and can become drug resistant.

_______ is an animal's ability to blend into its environment.

________ is the process in which humans choose the desired traits of an organism.

_____________ is famous for his work on natural selection.

________ is a bacteria that lives in the digestive tract of animals but can also make you sick.

A ________ is a part of a chromosome that is inherited from the parent(s).