1. The Study of Life
Chapter One
Biology

2. Biosphere
the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.

3. Biodiversity and Conservation
What is biodiversity?
Biodiversity is the variety of life in an area that is determined by the number of different species in that area.
Biodiversity increases the stability of an ecosystem and contributes to the health of the biosphere.

4. The Importance of Biodiversity
Biodiversity and Conservation
The Importance of Biodiversity
Most of the world’s food crops come from just a few species.
Wild species serve as reservoirs
of desirable genetic
traits that might be
needed to improve
domestic crop
species.
Teosinte plant
Domestic corn plant

5. Biodiversity and Conservation
Scientists continue to find new extracts from plants and other organisms that help in the treatment of human diseases.
Madagascar periwinkle

6. oxygen to the atmosphere and remove carbon dioxide.
Biodiversity and Conservation
A healthy biosphere provides many services to humans and other organisms that live on Earth.
Green plants provide
oxygen to the atmosphere and remove
carbon dioxide.
Natural processes provide drinking water that is safe for human use.

8. A species is often defined as the largest group of organisms in which two individuals can produce fertile offspring, typically by sexual reproduction.

9. All organisms share certain characteristics
Made up of cells—cellular organization
Need for energy—metabolism, homeostasis
Heredity
Response to the environment and stimuli
Reproduction, growth, and development
Adaptation through evolution .

10. Unifying Themes of Biology
All levels of life have systems of related parts
Six unifying Themes of Biology.
Cell Structure & Function,
Stability &Homeostasis,
Reproduction & Inheritance,
Evolution
 Interdependence of Organisms
Matter, Energy, & Organization.

11. Ecosystem
A physical environment with different species that interact with one another (biotic) and with nonliving things (abiotic)

12. Structure and Function are Related

13. Homestasis
The maintenance of constant internal conditions in an organism

14. Evolution explains the unity and diversity of life
Adaptation
Unity
Diversity

15. Why study biology?
Your health and the health of the environment depends upon it

16. Bio Tech impacts Biological Risks or Benefits?
GMO—genitically manipulated organisms
Transgenic---altered copies of their own genes
Benefits—human genetic screening
Ethics—view Ethics in Science