Evidence of Evolution

How do fossils provide evidence that evolution has happened on Earth?

• Fossils show how the sizes of certain animals has changed drastically over millions of years
• Fossils show that some species have gone extinct
• Fossils show how life forms present today are different than those from the past
• Different sedimentary rock layers provide evidence for how the environment has changed over time

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Similarities in bone arrangements, like those in the picture, support the hypothesis that...

• these organisms are not well adapted

• these organisms share a common ancestor

• these organisms all share the same DNA sequences

• these organisms are members of the same species

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NGSS.MS-LS4-2

Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures
• homologous structures
• adaptive radiation
• fossil

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NGSS.MS-LS4-2

Study of embryos of various organisms to show a common ancestor because of similarities in development

• natural selection
• embryology
• speciation
• evolution

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

The diagram illustrates an embryonic stage of two organisms.

Which of the following can be determined by observing the embryos shown in the diagram

• The organisms share a common ancestry.
• The organisms belong to the same genus.
• The organisms are native to the same geographic areas.
• The organisms will grow into anatomically similar adults.

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

Vestigial structures

• structures that perform a similar function but are not similar in origin

• remnants of once-important structures that have slowly lost all or most of their function

• features found in different organisms that share structural similarities but may have very different functions

• preserved remains of an organism

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NGSS.MS-LS4-2

What best describes the hind leg bones seen in the whale?

• The bones are analogous structures to the fins of living fish.

• The bones are vestigial structures that had a function in an ancestor.

• The bones are homologous structures to the wings of butterflies.

• The bones are fossil structures from an extinct ancestor.

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Match the following

• Same structure different function

• Vestigial Structures

• Structures in the body of an organism that no longer work.

• Embryology

• Comparing DNA and amino acid sequences of different species

• Homologous Structure

• Comparing embryo development of different species

• DNA Evidence

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

Which of the pictures above would be examples of homologous structures? (pick 2)

• 1

• 2

• 3

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

What conclusions can be made based on this table shown?

• the American black bear and the giant panda are most closely related

• the giant panda and the red panda are most closely related

• the red panda and the racoon are the most closely related

• the giant panda and the racoon are most closely related

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4