1. 1.How long did the voyage of the HMS challenger take? 2.What is the largest geological feature on earth? 3.What creates the earth’s magnetic field? Warm-ups this week will be added to those of the first week of December. These will be collected Dec 6 th.

2. Warm-Up 11/26 1.What are Chondrichthyes? Explain the meaning of the term and identify the type of animals belonging to the class. 2.What might be some advantages of oviparous reproduction versus viviparous reproduction? 3.What do you have that you are thankful for?

3. Warm-Up 12/2 WELCOME BACK! – Add these warm-ups to the 2 from last week 1.What organism did we discuss that is considered to represent the oldest living lineage of vertebrates? 2.What is a gnathostome? 3.What is the key defining characteristic of Chondrichthyes?

4. Warm-Up 12/3 1.What is function of the operculum? 2.How do sharks increase buoyancy without a swim bladder? 3.What is a tetrapod?

5. Warm-Up 12/4 1.What are the four types of fish scale we discussed? 2.What type of scales are present on chondrichthyes? 3.What are two functions of fish scales?

6. Warm-Up 12/5 1.What is the function of the gill rakers? 2.Why can’t a fish breath through its nose? 3.If a fish that typically possesses a lateral line suffers a survivable injury that completely destroys the lateral line, what behavioral changes might we be able to notice?

7. Warm-Up 12/6 1.Describe the relationship between dissolved oxygen content and water’s salinity and temperature. 2.Why are a living fish’s gills bright red? 3.Describe a counter current exchange system. Perch Dissection Today! Also, don’t forget to turn in your two warm-ups from the week before Fall break!