1. Chapter 1
Section 1

2. Characteristics of Living Things
All living things posses the following characteristics

3. Biologists have identified about 1.5 million species

4. Cells Cells are life’s basic unit of structure and function
All living things are made of cells
Cells are extremely small

5. The Cellular Basis of Life
All organisms are made up of cells
Multicellular organisms have specialized cells
The organism’s survival is based upon the functions and interactions of the cells.

6. Cellular Order

7. Reproduction
Sexual - Cells from two different parents unite to form the first cell of the new organism
asexual reproduction- A single parent produces off spring that are identical to itself

8. Reproduction

9. DNA and genes DNA is the chemical responsible for inheritance
It is located in genes on chromosomes in the nucleus

10. Inheritable Characteristics

11. Growth and Development
Cells divide for growth and development. Most cells undergo “differentiation” which causes them to take on special roles required for that organism. Skin cells, neurons, and blood cells are all specialized cells.

12. Growth & Development

13. Energy and Life
Metabolism is the net effect of what an organism builds up and breaks down
Producers trap the sun’s energy to produce food for entire ecosystem
Consumers eat (consume) the food made by the producers
This transfer of energy is not efficient

14. Energy

15. Interaction with the Environment
No organism is completely isolated from its surroundings. Stimuli cause an organism to respond.

16. Response to Environment

17. Regulation
Organisms regulate their internal body environment to maintain homeostasis
Internal environment stays about the same; while external environment changes

18. Homeostasis

19. Adaptation
Organisms possess adaptations that can be passed on to their offspring
Some adaptations make them more able to survive

20. Adaptation