Amplify Evolutionary History Critical Juncture

Which 2 species would complete the "More Closely Related" part of this model the best? (Your choices are Lizard, Pig, and Rat.)

• pig and lizard because they both have 4 legs

• pig and lizard because they evolved from a common vertebrate ancestor

• pig and rat because they both have 4 legs

• pig and rat because they evolved from a common mammal ancestor

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NGSS.MS-LS4-2

This fossil turtle and this living hawk both have a structure in their neck called the atlas bone. What best explains why both species have an atlas bone?

• The turtle and hawk are different species, so they must not share an ancestor population. They inherited their atlas bone structure from separate ancestor populations

• The turtle and hawk both share the same ancestor population that had an atlas bone. They inherited this structure from the ancestor population.

• It is impossible to say. Fossils are very old; therefore, we cannot make observations of the turtle’s ancestors, and we cannot explain its body structures.

• All species have their own specific body structures, so it is a coincidence that this turtle and hawk each happen to have the atlas bone structure.

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What is the process by which species adapt to environmental changes over a very long time ?

• evolution

• a common ancestor population

• speciation

• a generation

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Which of the following best describes a critical juncture in evolutionary history?

• A significant event that leads to rapid evolutionary changes

• A period of stability with no evolutionary changes

• A minor change in a single species

• A gradual change over millions of years

What is the term for the amplification of certain traits in a population due to environmental pressures?

• Natural selection

• Genetic drift

• Gene flow

• Mutation

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NGSS.MS-LS4-4

Which experiment would best demonstrate the concept of evolutionary history?

• Breeding fruit flies to observe genetic changes

• Mixing chemicals to create new compounds

• Observing plant growth under different light conditions

• Measuring the speed of sound in different media

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In the context of evolutionary biology, what does the term 'amplify' refer to?

• Increase in frequency of a trait

• Decrease in population size

• Stabilization of a species

• Introduction of a new species

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Which of the following is an example of a critical juncture in human evolutionary history?

• The development of bipedalism

• The extinction of dinosaurs

• The formation of the Earth

• The invention of the wheel

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How does the fossil record help scientists understand evolutionary history?

• By providing evidence of past life forms and their changes over time

• By predicting future evolutionary changes

• By showing the exact age of the Earth

• By detailing the daily life of ancient species

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What role do mutations play in evolutionary history?

• They introduce genetic variation that can lead to new traits

• They eliminate harmful traits from a population

• They stabilize existing traits

• They prevent any changes in a species

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