Topic 3 Lesson 4 Natural Selection and Change over Time

Paleontologists study ancient organisms. Over millions of years, sediment hardens into rock and preserves the remains of living things. A (a)   is the impression that an organism or part of an organism leaves in rock.

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NGSS.MS-LS4-1

Isabelle learns that the fossil record helps people understand life on Earth millions of years ago. Which statement is TRUE about the fossil record?

• The fossil record shows only evidence of traces of animals in rock

• The fossil record shows no evidence of how organisms evolved.

• The fossil record shows only plant life that has become extinct.

• The fossil record shows patterns that are like data that can be analyzed.

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Which organism would be analogous to the bat wing and homologous to the bat wing?

Groups:

(a) Homologous

,

(b) Analogous

,

(c) Both homologous and analogous

• 
• 
• 

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NGSS.MS-LS4-2

Fossils provide scientists with a great deal of information about prehistoric animals. There are two types of fossils: body fossils and trace fossils. Use the graphic organizer to classify each type of fossil in the word bank.​

Groups:

(a) Body Fossils

,

(b) Trace Fossils

• teeth marks on fossilized trees

• teeth of Megalodon

• burrows made by ancient animal

• fossilized Diplodocus egg

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Put the rocks layers in order from the OLDEST to the youngest

• 3

• 2

• 4

• 5

• 1

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Of the fossils provided, which one do you know has become extinct?

• Trilobite

• Crinoid

• Gastropod

• Ammonite

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NGSS.MS-LS4-1

The body structures in this image represent what key vocabulary term from this lesson?​ (a)   ​

• Homologous Structures
• Analogous Structures
• Anatomical Structures
• Heterologous Structures

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NGSS.MS-LS4-2

Only hard parts of an organism typically leave fossils. Categorize the parts of an organism in Most likely to form a fossil and least likely to form a fossil.

Groups:

(a) Most likely to form a fossil

,

(b) Least likely to form a fossil

• shells

• seeds

• worms

• hair

• skin

• jellyfish

• teeth

• feathers

• woody stems

• bones

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Natural selection explains how ​ (a)   can lead to ​ (b)   in a species.

• variations
• changes
• mutations
• adaptations
• evolution
• genetic drift

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NGSS.MS-LS4-4

Which of the following can be the cause of a mass extinction? Select more than one answer.

• volcanic eruptions

• asteroids striking Earth

• sudden climate change

• earthquake

• flooding

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