1. Tonight’s Biology Homework
Page 26
1-3, 7, 10, 15, 22 & 25

2. Characteristics of Life What makes something alive???

3. These are the official Characteristics of life:
*Organization
*Homeostasis/Regulation
*Reproduction
*Cellular Respiration(energy)
*Growth
*Development
*Adaptation & Evolution
Respond to stimulus

4. 1. Organization - a high degree of order
All living organisms are made up of one or more cells. (Unicellular or Multicellular)

5. ORGANIZATION
All living things show orderly structure or organization

6. Levels of Organization Atoms
Smallest particle of an element with the properties of that element.

7. Levels of organization - Molecules
Two or more atoms bonded together

8. Levels of organization - Organelle
Structures inside eukaryote cells that perform specific functions

9. Levels of organization - Cell
Smallest Unit of Life

10. Levels of organization - Tissues
Group of similar cells that perform a specific function.

11. Levels of organization - Organ
Structure composed of several tissues that forms a specific function.

12. Levels of organization Organ System
Circulatory system

13. Organism - Multicellular

14. Levels of Organization

15. Levels of Organization Number 1-8 & put in order according to size.
cell
organism
atom
molecule
organ
organ system
tissue
organelle
Atom
Molecule
organelle
Cell
Tissue
Organ
Organ system
organism

16. A response to maintain stability, or homeostasis (internal balance).
Maintaining
Homeostasis
A response to maintain stability, or homeostasis (internal balance).

17. Maintaining Homeostasis
thirsty drink water
body temp. at 98.6 pH
electrolytes
micro & macro excretion

18. 2. Reproduction Asexual  one parent Sexual  two parents
This is the only life process that
individuals do not need to survive.
Reproduction is essential for the continuation of the
organism’s species.
Species - a group of organisms that can interbred & produce a fertile offspring.

19. Cellular Respiration C6H12O6 + 6O2 → 6CO2 + 6H2O + 36 ATP
The release of energy from food.
The MITOCHONDRIA is where this happens.  
Most life forms receive energy from the breakdown of glucose.
glucose
C6H12O6 + 6O2 → 6CO2 + 6H2O + 36 ATP

20. Growth/Development From one cell, we grow/develope into a multi-cellular organism.

21. 4. Growth & Development: increasing in size and progressing through a life cycle

22. Development: Developmental stages for humans include birth infancy, childhood, puberty, adulthood, old age & death.

23. Frogs and most insects go through metamorphosis.

24. Adaptation
Any structure, behavior, or internal process that allows an organism to respond to stimuli & better survive in an environment is called an adaptation.
A gradual accumulation of adaptations over time is evolution.

25. Characteristics of Life
8. Evolution:
As a group, living organisms change over time.

26. Ability to react to external condition
All living things Response to a Stimuli
Ability to react to external condition
Cold - shiver
Run - heart beat increases
Food - salivate
Pet the squirrel -
happy squirrel or bloody finger