Natural Selection

Which of these best describes artificial selection?

• Snowshoe hares that turn white in winter hide better from predators.

• 
  Jamie saved seeds from a unique flower to plant the next spring.

• 
  Deer with the largest antlers attract the most mates.

Which statement best describes how Darwin thought about Earth after his voyage on the H.M.S. Beagle?

• 
  Earth and the organisms on it remain the same as they always were.

• 
  Earth remains the same, but the organisms on it change slowly.

• 
  Earth and the organisms on it change slowly over time.

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Match each scientist to the new idea they introduced to Darwin.Match the following

• Hutton

• Organisms pass acquired characteristics on to offspring.

• Malthus

• 
  Earth is very old

• Lamarck

• Geologic processes gradually change Earth's surface.

• Lyell

• Humans compete for resources.

Which of these organisms has the highest biological fitness?

• a squirrel that gives birth to three babies

• 
  a marathon runner with no children

• 
  a maple tree that produces 3,000 seeds

Examine the insect in the picture.

This photo was taken in a forest where most of the leaves are brown. A scientist moves several of these insects to a forest with mostly green leaves.

Which statement best describes the insect in each environment?

• 
  The insect's color is a better adaptation in the green forest than the brown forest.

• 
  The insect's color is a better adaptation in the brown forest than the green forest.

• The insect's color is adapted equally well to both the brown and green forests.

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Examine the diagrams.

Which graph shows disruptive selection?

• 
• 
• 

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How are genes and traits related to one another?

• 
  Genes and traits are both words for the same thing.

• 
  Traits change an organism's genes.

• 
  Genes contain DNA that codes for traits.

Tags

NGSS.HS-LS3-1

Which of these does evolution affect the most?

• 
  organisms

• 
  appearance of new traits

• 
  gene pool

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NGSS.HS-LS4-2

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NGSS.HS-LS4-1

Which of these contributes to evolution?

• All organisms have the same traits.

• 
  Some organisms have higher fitness than others.

• Organisms share resources equally with one another.

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