Survival of the fittest

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

Which of the following best illustrates natural selection?

• An organism with favorable genetic variations will tend to survive and breed successfully.

• A population monopolizes all of the resources in its habitat, forcing other species to migrate.

• A community whose members work together utilizing all existing resources and migratory routes.

• The largest organisms in a species receive the only breeding opportunities.

Which of the following is NOT part of the that mechanisms of natural selection?

• Organisms produce more offspring than can survive.

• Disease and natural disaster will limit population growth.

• Species today descended with modifications from ancestral species.

• Organisms with advantages will survive and reproduce.

Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

Due to pollution, a pond becomes darker over time. Which trait variation became more common?

• light fish

• dark fish

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.

Natural Selection is driven by a change in the environment and survival of the

• Earth

• Fastest

• Fittest

• Biggest

Definition: adaptation

• inherited characteristic that increases chances of survival
• organisms with traits well suited to their environment survive and reproduce at a greater rate
• a growing population causes a scarcity of resources
• differences in the DNA sequence