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EH: 2.5 (3/3) Version B

Last updated over 2 years ago

8 questions

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Objective:  SWBAT create a model that represents how organisms with common ancestors can have similar and different body structures

Do Now: 

Question 1

1.

Put the following sequence of events in the correct order by placing a “1” indicating the first event, and a “4” indicating the last event:

Question 2

2.

How did wolves, whales, and the Mystery Fossil become so different from their common ancestor population?

"I think the wolves, whale, and Mystery Fossil looks so different from their common ancestor because ..."

(THINK: How does physical features change based on the environment?)

Guided Notes: 

Question 3

3.

Launch Evolutionary History Modeling Tool activity: Population Changes.
In the Modeling Tool, a population is divided into two populations in different environments. In each environment, different structures are useful for survival.
Goal: Show how the body structures of the populations in each environment might change over time.
Do:
Read the information at the top of the screen.
Move organisms from the toolbar to the open locations in both branches of the tree.
Press INDICATE ORGANISM TYPE and select an option for each organism.
Tip:
You do not have to use all the organisms in the toolbar.

Practice:

Question 4

4.

How does this model show how species that share a common ancestor can become very different from one another?
CFS:
student describes the relationship between anatomical similarities and differences in animal species
student describes the chronological difference between animal species with a common ancestor based on body structures

This model shows how species that share a common ancestor can become very different because both descendant 1 and 2 look very different even with a common ancestor. 

This model shows how species that share can become very different because they share a common ancestor. 

This model shows how species that share a common ancestor can become very different because  descendant 1 and 2 live in different environments. 

Question 5

5.

What remains stable over time in your model? What changes?
CFS:
student describes the relationship between anatomical similarities and differences in animal species
student describes the chronological difference between animal species with a common ancestor based on body structures
"For descendant 1 and 2 features that remain the same are ... "

(THINK: what body parts are the same in the common ancestor AND descenant 1 and 2?)

Question 6

6.

Why do you think the body structures of each population at time 2 are different?
CFS:
student describes the relationship between anatomical similarities and differences in animal species
student describes the environmental difference between animal species with a common ancestor based on body structures
"I think the body structures of each population at time 2 are different because ... "

(THNK: what happened immediately after the common ancestor on the evolutionary tree? Why does this matter? )

Exit Ticket:

Question 7

7.

How do species that share a common ancestor can become very different from one another?
CFS:
student describes the relationship between anatomical similarities and differences in animal species
student describes the chronological difference between animal species with a common ancestor based on body structures

Species that share a common ancestor can become very different from one another if their environments change causing new traits to be adaptive in their individual environments. 

Species that share a common ancestor can become very different from one another if they randomly mutate enough times to pass down the new traits. Environment is not a factor. 

Question 8

8.

Why do you think the body structures of each population at time 2 are different?
CFS:
student describes the relationship between anatomical similarities and differences in animal species
student describes the environmental difference between animal species with a common ancestor based on body structures
"I think the body structures of each population at time 2 are different because ... "

(THNK: what happened immediately after the common ancestor on the evolutionary tree? Why does this matter? )