EH: 3.1 (3/8) Version B

Last updated over 2 years ago

6 questions

Objective: 
SWBAT model similarities and differences in species that have a common ancestor.
SWBAT explain how embryos provide clues for understanding evolution

Do Now: 

Imagine that each of the new descendant species was split again into two new environments, and even more time went by. Now, there are four new environments. Use the tree below to think about the differences between those four new populations over millions of years, and answer the questions below.

Which group of descendant species is most likely to have body structures that are the most different from the ancestor population?

Which descendant species are most likely to have body structures that are the most different from Descendant Species B?

Exit Ticket Review: 

Exemplar: 
"i think that the body structure of each population at time 2 are different because with a new different environment the species need to become adaptive. So in order for that to happen mutations need to occur. With these new mutations the species are able to live longer ans reproduce with these mutations causing time 2 to have more adaptive traits."

Approaching: 
"I think that the body structures of each population at time 2 are different because of the different environments they were in because of their adaptive traits."

Guided Notes: 

Complete the guided notes below.

Practice:

 Goal: Create Species A, F, and G by using body structures that each species probably had. Look at the descendants and/or common ancestors of each missing species to figure out the likely body structures. (Hint: There is more than one possible way to build Species F and G.)

Examine the four living species on the evolutionary tree. (H,I,J and K) and record the structures they have in common in the table below.

Which species (I, J, or K) is the closest relative to Species H? What is your evidence?
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
"I think the closest relative to Species H is ... because ... "

(THINK: Which species has the most in common with H? )

Exit Ticket:

From species C, E, and D, which pair of species is most closely related? Explain how you know.
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
"I think the closest relative to Species are ... because ... "

(THINK: Which species have the most in common? )