Ms Ls4 2

Homologous structures are bones or organs found in different animals which very closely resemble structures in different organisms. What can you conclude about the past of these organisms?

• They all have evolved through natural selection but do not use these structures anymore.

• They all share a common ancestor but have evolved through natural selection

• They all share a common ancestor but did not evolve from natural selection

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

The evolution of the horse is the most complete fossil record we have of a single organism. Using the picture, what can you conclude happened to the horse over time?

• The horse grew larger and lost its toes

• The horse shrank and lost its toes

• The horse grew larger and gained toes

• The horse shrank and gained toes

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

How are these rocks deposited?

• By volcanoes

• In chronological order

• By earthquakes

• by putting the oldest on top

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NGSS.MS-ESS1-4

The most recent ancestral form or species from which two different species evolved is known as ________________________.

• a common ancestor.

• an embryonic stage.

• development.

• evolution.

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NGSS.MS-LS4-2

Snakes have traces of leglike structures that are not used for movement. Which inference is supported by this fact?

• Snakes do not have ancestors.

• Snakes are an example of transitional fossils.

• Snakes share a common ancestor with animals that have legs.

• Snakes and animals that have legs are part of the same species.

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NGSS.MS-LS4-2

_____________  is the study of embryos to see how their similarities and differences indicate an evolutionary relationship.

• Paleontology

• Common ancestry

• Homologous structure

• Embryology

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NGSS.MS-LS4-3

Which of these is least likely to be used to infer evolutionary relationships?

• similarities in habitats

• similarities among embryos of organisms

• similarities at the genetic and molecular level

• similarities between living and fossilized organisms

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

Which of the following is an example of homologous structures?

• Wings of a bat and wings of a butterfly

• Flippers of a dolphin and hands of a human

• Eyes of a human and eyes of a squid

• Leaves of a tree and petals of a flower

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NGSS.MS-LS4-2

Scientists use evidence from their findings to support theories of life on earth. Which of these findings could not be used to provide supporting evidence that life on earth has changed over time?

• increasing complexity of fossils in younger rock layers

• increasing diversity of fossils in rock layers following an extinction

• transitional fossils

• rock layers with no fossils

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NGSS.MS-LS4-1

Which of these best describes the tiny leg bones that some whales have, which do not aid in their movement or serve any other function?

• structures that grow and improve in function as they are used

• structures that will become adaptations when the environment changes

• structures that are a remnant of the adaptations that the whale’s ancestors needed to survive on land

• structures that function at certain times of the year or under certain conditions

Tags

NGSS.MS-LS4-2