Semester 2: Unit 7 Natural Selection
Directions: Please fill out this study guide with the correct answers using your lessons as a source of help. Once completed, you will upload this to your sample work dropbox for the corresponding unit.
Match the following terms with their definitions:

natural selection (U7L4), antigenic drift (U7L6), competitive advantage (U7L5),
correlation/ (U7L7), causation (U7L7), evolution (U7L5), species(U7L5)

Word
Definition


A change in the characteristics and/or behavior of a species or population over time.

A trait of an organism that gives it a greater chance of surviving and reproducing in a given environment.


A natural process seen in viruses in which mutations caused by the process of viral replication cause the virus to appear differently to the immune system.


When an observed event or action makes another event or action happen.


A group of organisms that can interbreed and produce fertile offspring.


A process by which individuals that are better adapted to an environment survive better and reproduce more often. This leads a population to have a widespread expression of an advantageous trait.


A relationship between two sets of variables in which one variable responds to changes in another variable.


Answer the following questions/statements (each number should have a response):
A population of rabbits living in the desert have two fur phenotypes, brown and white. Analysis shows that over 3 generations, the brown fur rabbits have increased to 80% of the population. Explain why this occurred? (U7L2)

Explain how to distinguish different species by their DNA. (U7L3)

Explain why Charles Darwin discovered so many different but related species of finches on the Galapagos Islands. (U7L5)

Explain how fossils show evidence for the process of natural selection. (U7L8)

How does antigenic drift make it so hard for our immune systems to protect us from viruses like the flu? (U7L6)

What is the relationship between skin pigmentation and how close a human population lives to the equator? (U7L7)

What happened to the peppered moth population in England during the 1800’s? Why? (U7L7)