1. Answer all questions in complete sentences.
Write all underlined statements.

2. KEY CONCEPT Biology is the study of all forms of life.
1. What does biology mean?

3. Earth is home to an incredible diversity of life.
The biosphere includes all living things and all the places they are found on the Earth.
biosphere = everywhere life exists
2. What is a biosphere?

4. Earth is home to an incredible diversity of life.
Every part of the biosphere is connected with every other part.
The biosphere includes many environments.
land environments
3. What types of environments are in a biosphere (4)?

5. The biosphere includes many environments.
saltwater and freshwater environments
Atmospheric environments
Tidepool
Estuary
3. What types of environments are in a biosphere (4)?

6. Biodiversity is the variety of life.
Biodiversity generally increases from the poles to the equator.
Biodiversity is greater in areas with consistently warm temperatures.
Biodiversity is greater closer to the equator.
4. What is biodiversity?
5. Where does biodiversity increase?
6. Where is biodiversity greatest?

7. A species is one particular type of living thing.
Members of a species can interbreed to reproduce.
There are about 2 million different living species have been identified.
7. What determines if two organisms are the same species?

8. All organisms share certain characteristics.
Biology is the scientific study of all forms of life.

9. An organism is any individual living thing.
All are made of one or more cells.
8. What are the characteristics of living things (4)?

10. An organism is any individual living thing.
All are made of one or more cells.
All need energy for metabolism.
All respond to their environment.
All have DNA that they pass on to offspring.
8. What are the characteristics of living things (4)?

11. KEY CONCEPT Unifying themes connect concepts from many fields of biology.

12. All levels of life have systems of related parts.
A system is an organized group of interacting parts.
A cell is a system of chemicals and processes.
A body system includes organs that interact.
An ecosystem includes living and nonliving things that interact.
9. What is a system?

13. Biologists study many different systems.

14. Structure and function are related in biology.
Structure determines function.
Proteins with different structures perform different functions.
Heart muscle cells have a different structure and function than stomach muscle cells.
Different species have different anatomical structures with different functions.
10. How are structure and function related?
11. How does the structure of your foot determine its function?

15. Organisms must maintain homeostasis to survive in diverse environments.
Homeostasis is the maintenance of constant internal conditions.
12. What is homeostasis?

16. Behaviors and adaptations can help maintain homeostasis.
13. How does a polar bear’s fur help maintain homeostasis?

17. Evolution explains the unity and diversity of life.
Evolution is the change in living things over time.
The genetic makeup of a population of a species changes.
Evolution can occur through natural selection of adaptations.
Adaptations are beneficial inherited traits that are passed to future generations.
14. What is evolution?
15. How can evolution occur?
16. What is an adaptation?

18. Evolution accounts for both the diversity and the unity of life.
17. What does evolution account for?

19. Stop – write this
What are the unifying themes of biology?
Systems
Structure & function
Homeostasis
Evolution