Natural Selection

Identify and explain the four pieces of strong scientific evidence that support the Scientific Theory of Evolution.

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A population of green frogs lives in a shallow pond in Altman. A few of the frogs have a random mutation that causes their skin pigment to be brown rather than green. Explain a scenario where this mutation could be just one of the normal variations of the frog color along with green as well.

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"Look at these giraffe fossils over time! The necks are so much shorter millions of years ago! I wonder if over time the giraffes reaching for the higher leaves on the Acacia Trees caused the species to grow longer necks!!!"

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Compare and contrast a change in a population over time due to genetic drift versus natural slection.

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the process by which the individuals best adapted to their environment tend to survive and pass their traits to subsequent generations

• mutation

• transition

• tetrapod

• natural selection

any trait of an organism that increases its chances of surviving and reproducing

• artificial selection

• allele

• adaptation

• mutation

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Which of the following best describes natural selection?

• A process where organisms better adapted to their environment tend to survive and produce more offspring

• A random change in the DNA sequence of an organism

• The breeding of plants and animals to produce desirable traits

• The movement of individuals into or out of a population

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In a population of beetles, some are green and some are brown. If birds prefer eating green beetles, what is likely to happen over time?

• The population will have more green beetles

• The population will have more brown beetles

• The population will remain the same

• The beetles will change color to avoid predation

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Which of the following is an example of natural selection in action?

• Farmers breeding cows to produce more milk

• A species of moth changing color to blend into its environment

• A scientist genetically modifying bacteria

• A dog learning a new trick

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What is the main driving force behind natural selection?

• Random mutations

• Environmental pressures

• Human intervention

• Genetic drift

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