Natural Selection Review

The differences among a species, like different bird beaks, are called

• genes.
• variations.
• traits.
• theories.

Organisms with the most beneficial traits will survive.  This is commonly known as

• theory of evolution.
• variations.
• survival of the fittest.
• ecosystems.

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation
• Adaptation
• Behavior
• Environment

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

Do organisms "decide" to evolve and change?

• Yes, they know they need to change to survive 
• No, they change because of natural selection

Match the following

• Mutation

• A sudden change in one or more characteristics due to a change in a gene

• Migration

• Occurs due to physical difference as a result of a genetic difference

• Gene Flow

• The movement of organisms from one place to another

• Non-Random Mating

• the movement of genes into or out of a population

• Genetic Drift

• Random chance; small population

Which of the following best describes what the image represents?

• Genetic Drift

• Migration

• Mutation

• Natural Selection

Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures
• homologous structures
• adaptive radiation
• fossil

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

• Fossil A and C are the same age
  
• Fossil B is older than fossil C
• Fossils A is older than fossil B
• Fossil D is older than fossil C