When a portion of a population moves into or out of an area causing changes in the gene frequency it is known as _____________________.

• Genetic Drift

• Gene flow

• Founders Effect

• Bottleneck Effect

As we grow up we learn how to speak by listening to our parents and other members of our communities. This is an example of a _______________ behavior.

• Altruistic

• Learned

• Instinctive

• Mutative

Darwin’s hypothesis about how life changes over time is now called the Theory of _________________

• Evolution

• Variation

• Derived characters

• Use and disuse

Due to its similarities to artificial selection, Darwin referred to the “survival of the fittest” as _____________.

• Struggle for existence

• Use it or lose it

• Natural selection

• Only the best survives

Natural genetic differences between individuals of a species are referred to as _________.

• Adaptations

• Evolution

• Natural variation

• Fossils

The diagram shows fossils in different rock layers. Which of these statements about the age of these fossils is most likely correct?

• a. Fossil A and C are the same age

• b. Fossil A is older than fossil B

• c. Fossil B is older that fossil C

• d. Fossil D is older than fossil C

Due to overhunting, the American Bison population was reduced drastically in a short period of time leading to a change in the gene frequency of the population. What evolutionary mechanism does this most closely relate to?

• Gene flow

• Genetic drift

An inherited characteristic that increases an organism’s ability to survive and reproduce in a specific environment is called a(n) _________________

• Adaptation

• Homologous structure

• Analogous structure

• Vestigial organ

Which of the following are an example of a vestigial structure or organ?

• Bat wings

• The fins of a shark

• The hipbones on a whale

• The legs of a dog

Structures that have different mature forms but develop from the same embryonic structures are called ____________________ structures.

• Homologous

• Analogous

• Fossil

• Derived