Evidence for evolution

The fossil record help scientists

• better understand the kinds of organisms that lived in the past

• better understand how the environment has changed over time

• better understand how organisms have evolved over time

• all of the above

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

What is common ancestry?

• When a species no longer exists

• When organisms are descended from a single ancestor

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NGSS.MS-LS4-2

The forelimbs of humans, cats, whales, and bats are similar in structure due to having a common ancestor hundreds of millions of years ago. Is this considered homolgy or analogy?

• Homology

• Analogy

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NGSS.MS-LS4-2

How does embryology support the Theory of Evolution?

• It shows that they have a common ancestor because of their similarities.
•          I'm not sure.
• Animals change over time. 

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

A change in the inherited characteristics of an organism over time is ________

• evolution.
• development.
• growth.
• ancestry.

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

NGSS.MS-LS4-6

Common ancestry relates to evolution because

• evolution only happens when there are common ancestors.
• Common ancestors make evolution happen more quickly.
• evolution can never take place with common ancestors.
• the more two organisms have in common, the more recent is their common ancestor during their evolution.

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NGSS.MS-LS4-2

In stage one (top row) of these embryos, most of the embryos________

• look very similar.
• have very different features.
• show different stages of development.
• have only a tail if they are non-human.

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

In the the third embryonic stage (bottom row), mammal embryos _____

• have more characteristics in common with each other than with reptiles or birds.
• are still hard to tell from reptiles and birds.
• have the same features as fish, reptiles, and birds.
• do not have tails.

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

In stage 2 (middle row) fish embryos _________

• are very different bird and mammal embryos.
• are still very similar to bird and mammal embryos.
• show arm and leg buds.
• are the only embryos with tails.

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

What type of evidence is represented in the picture above:

• Fossils

• Vestigial Structures

• DNA

• Homologous Structures

Tags

NGSS.MS-LS4-2