1. Find your assigned seat!
Make sure that your Student Info Sheet (front AND back) is complete.
Keep it with you until you receive a textbook (tomorrow), so that you may write your textbook number on the sheet. Then, turn in the sheet. Thanks!

2. Ch 1: Exploring Life
Get a textbook from the cabinet & write your name inside the front cover.
Place your book number on the appropriate line on the student info sheet.
If completed, turn in student info sheet in the tray by the door.

3. Ch 1: Exploring Life
1. What is the hierarchy of life? (smallest to largest)

4. 6 Organs and organ systems
8 Cells
6 Organs and organ systems
7 Tissues
10 Molecules
9 Organelles
50 µm
10 µm
1 µm
Cell
Atoms

5. Figure 1.3 Exploring Levels of Biological Organization
1 The biosphere
2 Ecosystems
3 Communities
4 Populations
5 Organisms

6. Ch 1: Exploring Life
1. What is the hierarchy of life? (smallest to largest)
2. What is the scientific method?

7. Ch 1: Exploring Life
1. What is the hierarchy of life? (smallest to largest)
2. What is the scientific method?
a way to solve problems

8. Ch 1: Exploring Life
1. What is the hierarchy of life? (smallest to largest)
2. What is the scientific method?
a way to solve problems – Steps??

9. Ch 1: Exploring Life
1. What is the hierarchy of life? (smallest to largest)
2. What is the scientific method?
a way to solve problems – Steps??
Problem/question
Research
Hypothesis/plan
Experiment
Results
Conclusion
Revise hypothesis/plan

10. Ch 1: Exploring Life
1. What is the hierarchy of life? (smallest to largest)
2. What is the scientific method?
3. Good Experimental Design

11. A preliminary study testing the effectiveness of a colon cancer chemotherapy drug was implemented on mice at Wake Forest University. Over a period of 6 weeks, mice were split into seven equal groups. One group was given a placebo, while the other six groups were given incrementally increasing dosages of the drug. Initial measurements of tumor mass at Day 0 were then compared to measurements of tumor mass at day 42 in order to determine % shrinkage (or growth) of tumor from the original size.

12. Good Experimental Design
Ch 1: Exploring Life
Good Experimental Design
Hypothesis
Independent (cause) & dependent (effect) variables
Control group & experimental groups
 Placebo  Receive chemotherapy (in different dosage)
Constants – same environment, time, amt. of food, 1 pill/wk.
Control – mice given no chemotherapy drug
Random sampling
Large sample size (n)
Repeated – multiple trials
Graphs
Title your graph & label axes w/ units
Keep same scale
Start at X & Y vertex
Connect dots
Key – if more than one line