March 31 (B Day) and April 1 (A Day)

OBJECTIVE: Students will categorize organisms by similar traits in order to classify using the three domain system of classification.

WARM-UP: Presentation Pro 18.3
Categories that are used to organize an assortment of things should be valid. That is, they should be based on real information. However, categories should be useful, too. Suppose that you are taking a survey of traffic. You sit at the side of a busy intersection and record the vehicles you see in one hour.
1. What categories could you use to organize your count of vehicles?

2. Look at your list of categories. Are all of them equally useful?

3. Is there more than one valid and useful way to organize living things?

VOCABULARY:
1) derived character
2) cladogram
3) molecular clock
4) domain
5) bacteria
6) Eubacteria

CLASSWORK:
1) Warm-Up/Vocabulary
2) Review of 18-2 and 18-3 using PresentationPro
3) QuickLab in Section 18-2
4) "Go Fish"
5) Closure

TONIGHT'S HOMEWORK:
Read and outline 18-3

HOMEWORK DUE:
18-2 Outline and Lab

ANNOUNCEMENTS:
None