EE Chapter 1: The Meaning of Evolution

Question 1

What does Change Over Time mean?

Answer 1

• Life is different now… than long ago
• Also refers to minor changes . . .Population Genetics

Question 2

What is Universal Common Descent?

Answer 2

-All organisms come from a single common ancestor -A tree with many branches, but one trunk or root Speciation(branch splits) Extinction(line ends)

Question 3

Cause of Change

Answer 3

-The mechanism of change . . . Natural Selection acting on random variations Mutations provide the variations that Natural Selection acts upon

Question 4

What are the 3 Definitions of Evolution?

Answer 4

1: Population Genetics

Question 5

How do we explore the HISTORY of life?

Answer 5

Make conclusions about past events based on present facts Which theory best explains the present facts?

Question 6

What is Darwin’s Theory Today: “Neo-Darwinism”?

Answer 6

Natural Selection acts on Mutation (DNA copying errors) to produce change

Question 7

Neo-Darwinism has added the modern field of _____ to Darwin’s original Theory of Evolution?

Answer 7

Genetics