Fossils And Evolution By Natural Selection

Question 1

Index fossil

Answer 1

A fossil that is useful for dating and correlating strata In Which it is found

Question 2

Natural selection

Answer 2

The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expanded by charges Darwin and is now believed to be the main process that Brings about evolution

Question 3

How can fossils be used to describe past environmental conditions

Answer 3

Fossils are the remains of once living organisms. And most fossil remnants are of extinct species. Together, these concepts formulate the principle of fossil succession, also known as the law of faunal succession.

Question 4

Assemblage

Answer 4

biostratigraphic unit of being a section of geological strata that is defined on The basis of its characteristic fossil taxa or faunal assemblage.

Question 5

Vestigial structures

Answer 5

Common descent and evolutionary theory. Vestigial structures are often homologous to structures that are functioning normally in other species.

Question 6

Homologous structures and analogous

Answer 6

Homologous structures are structures that are similar in related organism because they were inherited from a common ancestor.

Analogous structures: are similar structures that are in unrelated organisms