Evolution Review

What is extinction?

• The disappearance of a species

• Trace of a long dead organism

• To change genetically in a population to better survive in an environment

• One species leaving and going somewhere else

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NGSS.HS-LS2-6

NGSS.HS-LS4-5

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years. How many grams are left after 1 half life? 

• 100 grams

• 25 grams

• 2 grams

• 50 grams

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NGSS.HS-PS1-8

After the third half-life how much of the sample is left?

• 1/2

• 1/4

• 1/8

• 1/16

A 100 gram substance has a half life of 2 years. How many grams will be left after 6 years?

• 50

• 20

• 25

• 12.5

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NGSS.HS-PS1-8

A substance has a half life of 5 years. How many years will it take for an 80 g sample to decay to 10 g? (Remember, you must add 5 years for each half-life.)

• 10 years

• 15 years

• 20 years

• 25 years

Which is an example of an aquired trait?

• giraffe necks became longer as they started eating leaves off of trees

• wings on birds evolved from wings of insects

• breeding plants to produce more food

• breeding dogs for hunting

What is a homologous structure?

• similar structures on totally different species with the same function

• similar features that originated in a shared ancestor

What is an analogous structure?

• similar structures on totally different species with the same function

• similar features that originated in a shared ancestor

Which of the following is not evidence of evolution?

• Homologous structures

• Analogous structures

• Similarity in embryos

• Extinction

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NGSS.HS-LS4-1

NGSS.HS-LS4-5

What was Lamracks theory?

• environment s determined which individuals passed down traits

• proposed that similar species descended from a common ancestor

• newer forms of a species are modified descendants of older species

• the unequal survival and reproduction that results from the presence or absence of particular traits due to competition