Time is now up for the Do Now!Six minute(s) for Do NowFive

Day 15. How can species have similarphysical features without being closely related?

HW or study questions? @MrLinehan

FourThreeTwoOne

INDEP

To answer the question:• Explain the

relationship between the environment and analogous characters

Vocab for today:• Analogous characters• Convergent evolution

Agenda• WHOLE: Review of Do Now• COOP: Tower building• WHOLE: Guided notes • WHOLE: Essay analysis• INDEP: Essay practice• COOP: Grading essays• ASSESS: Exit quiz• Check-out

WHOLE

The Do Now.Let’s review.

WHOLE

Your challenge: build a towerWHOLE

• As a group, build the tallest freestanding tower possible– Freestanding – cannot rely

on anything else for support

• Movement: do not leave your element team’s table

• You have fifteen minutes

Getting supplies…WHOLE

When I say go...• The tallest member of your

group will come and get:1. 1 newspaper2. 1 meter of masking tape3. A scoring rubric for you to

turn in

Your challenge: build a towerCOOP

• As a group, build the tallest freestanding tower possible– Freestanding – cannot rely

on anything else for support

• Movement: do not leave your element team’s table

• You have fifteen minutes

And… time!Let’s talk about those towers.

WHOLE

A problem…WHOLE

1. Based on their physical features, what pairs belong together on a cladogram? 2. What pairs actually have the more recent common ancestors?

The fixWHOLE

Analogous charactersare physical characters that evolve

through convergent evolution*.

* for definition, see D8 notes

The fixWHOLE

Convergent evolution means thattwo distantly related species face similar competitive pressures

and adapt by developing structures thatperform the same function.

The fixWHOLE

Analogous features are different from homologous structuresbecause they perform the same function and are not evidence

of a shared ancestor. Therefore, the structure of analogous characters may be

different.

Wait – what was that?!WHOLE

Homologous structureSame structure, different function, evidence of common ancestor,divergent evolution

Analogous structureDifferent structure, same function, not from common ancestor,convergent evolution

Understanding rubricsWHOLE

You would receive one point for each of the following:o Including (1) an

introduction with your claim, (2) evidence/justification, (3) a conclusion that (4) explains why the topic is important or relevant

o Definition of cladogram

o Definition of phylogeny

o Explanation of specific information cladograms provide

o Description of an example

 

Explain how cladograms show phylogeny.

Cladograms are graphic organizers that show phylogeny, or evolutionary history. Cladograms show many species branching off over time and organize species based on their ancestral and derived characters. So a cladogram might have birds branching off after four limbs but before hair or fur. Because they do this, cladograms are imporant.

An exemplar responseWHOLE

You would receive one point for each of the following:o Including (1) an

introduction with your claim, (2) evidence/justification, (3) a conclusion that (4) explains why the topic is important or relevant

o Definition of cladogram

o Definition of phylogeny

o Explanation of specific information cladograms provide

o Description of an example

 

Explain how cladograms show phylogeny.

Cladograms are graphic organizers that show phylogeny, or evolutionary history. Cladograms provide a hypothesis about how species evolved from a common ancestor over time by studying what features they share, which we call ancestral characters. As you move up a cladogram, or forward in time, you see more species branch off. When a species develops new characters that others do not, we call this a derived character. Because the cladograms tells us about how different traits may have evolved over time, they can tell us how closely species are evolutionarily related, which is an important theme in this unit.

Essay practiceWHOLEINDEP

When I say go...• Complete the essay on

your practice sheet based on today’s guided notes

• Use the rubric to guide your writing!

• You have ten minutes

Correct your neighbor’s essayWHOLECOOP

When I say go...• Trade essays with a neighbor

– If in a group of three, trade to your right!

• Read the essay and check the points on the rubric!

• Give them a final score out of five

• You have four minutes

Exit quizASSESS

• Answer multiple choice on clickers using the student code in your binder.

• ASSESS expectations will apply– Any talking or materials on the desk will result in a 0.– It must be silent until every person has turned in the test.

Track your scoreINDEP

Record your screen in the “score one” column of the second row of your unit 2 cover sheet

Exit procedures• Line up in back• Chairs pushed in (A3 & B7 - on tables)• Area cleaned up• Nothing left in the room!• Get today’s participation score, MissionBucks,

and afternoon passes from Mr. Linehan

WHOLE