Natural Selection

Natural Selection

Only the strong survive!

Natural Selection

Survival of the Fittest

Let's Review

Evolution

Multiple Choice

Change over time

• Natural Selection
• Selective Breeding
• Homeostasis
• Evolution

Multiple Choice

What word describes a trait that helps an organism survive in its environment?

• natural selection

• mutation

• camouflage

• adaptation

Multiple Choice

When every organism of a species has died.

• Evolution
• Natural Selection
• Extinction
• Artificial Selection

Multiple Choice

Survival of the Fittest and Evolution were proposed by what scientist?

• Charles Darwin
• Albert Einstein
• Steven Hawking
• Isaac Newton

Multiple Choice

How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

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Organisms produce more offspring than can survive

• Overproduction

• Variation

• Struggle to Survive

• Survival of the Fittest

• Inheritance of Traits

Inherited Variation are the variations that are passed down.

Multiple Choice

Adaptation is

• the process that makes an organism look better

• the process in which weak organisms are killed off

• the process in which an organism becomes better adapted to its environment

• the process in which oxygen is transformed into glucose

Multiple Choice

Natural Selection can act only on ________.

• Acquired Traits

• Varied Traits

• Inherited Variation

• Acquired Variation

Multiple Choice

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

Multiple Choice

Definition: competition

• 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

Multiple Choice

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

• light fish

• dark fish

Multiple Choice

What is most likely to happen to moth populations in the picture shown?

• Light moths--hunted easily, dark moths--population increase

• Dark moths--hunted easily, dark moths--population increase

• Light moths--hunted easily, light moths--population increase

• Lights moths will change their color to match dark moths.

Multiple Choice

Differences in traits are called:

• natural selection

• genetic variations

• artificial selection

• adaptations

Multiple Choice

What is natural selection?

• process in which helpful traits become more common over time

• a trait that helps an organism survive better

Multiple Choice

What is natural selection?

• process in which helpful traits become more common over time

• a trait that helps an organism survive better