1. Ch. 1: Characteristics of Life Questions of the Day
Ch. 1: Characteristics of Life Questions of the Day... Answer in complete sentences
What do organisms need in order to survive?
What is the smallest form of life that you can think of?
What are characteristics of living things?
What is Biology and how is it beneficial?
What might a Biologist study?

2. Ch. 1: Characteristics of Life Objectives
Identify the characteristics that living organisms exhibit.
Explain the different fields biologists enter.

3. Ch. 1 Characteristics of Life
Biology is the study of Life
Biologists study living things, their behaviors, how their systems work, and anything related to living or once living things.
What are some things that biologists would study?

4. Ch. 1: Characteristics of Life

5. Ch. 1: Characteristics of Life
Basic Necessities
Food for Energy
Water
Oxygen

6. Ch. 1 Characteristics of Life
All organisms are made up of at least 1 cell.
Unicellular – 1 cell
Multicellular – Many cells

7. Ch. 1 Characteristics of Life
QUESTION!
What do you think makes an organism complicated?
Can anything living truly be considered simple?

8. Ch. 1 Characteristics of Life
All organisms display organization.
Cells
Tissues
Organs
Organ Systems
Organism
Organization goes from basic to increasingly complex...

9. Ch.1 Characteristics of Life
All organisms grow and develop.
Grow - Add mass to get larger.
Develop – Process of change/maturing
Tadpole => Frog
People do not stay infants. We undergo change and develop over time.

10. Ch. 1 Characteristics of Life
All organisms reproduce
Asexual – 1 parent divides to become 2 genetically identical offspring (bacteria)
Sexual – 2 parents combine genetic information to produce genetically different offspring (mammals)

11. Ch. 1 Characteristics of Life
QUESTION!
You see a bear lying down in a forest. There is a stick nearby... How can you determine if it is alive?

12. Ch. 1 Characteristics of Life
All organisms respond to stimuli
Stimuli – environmental cues that cause a response
Response – reaction to the stimuli
Living things will respond to a stimulus.
Poke the bear...

13. Ch. 1 Characteristics of Life
All organisms require energy in order to survive.
Carry out processes of life.
Energy molecule used is ATP (adenosine triphosphate)
Produces – organisms that make sugar (plants)
Consumers – organisms that eat the sugar (animals)

14. Ch. 1 Characteristics of Life
QUESTION!
King crab fishing in Alaska is considered the deadliest job. Why?
What happens if a crew member falls into the freezing (sub zero) Bering Sea?

15. Ch. 1 Characteristics of Life
All organisms maintain homeostasis
Homeostasis – a controlled internal environment
Human temperature F or 37 C
Blood sugar mg/dl
Optimum range for operation
Turtles? Cold blooded. What do they need?
If an organism's internal environment changes and disrupts homeostasis, chemical reactions stop and death can occur.

16. Ch. 1 Characteristics of Life
QUESTION!
If the Zombie Apocalypse happens, will society and the world as we know it change?
What will people have to do in order to survive?

17. Ch. 1 Characteristics of Life
All organisms adapt and evolve.
Evolve – changes over a period of time.
Adapt – to become more fit to live in an environment
Evolution occurs when new adaptations show up in a population.
These adaptations arise when changes in DNA occur.
Humans will have to adapt to the new zombie world and evolve to become immune in order the species to survive the zombie apocalypse.

18. Ch. 1: Characteristics of Life

19. Ch. 1: Characteristics of Life
Biologists study all things related to living and once living things.

20. Ch. 1: Characteristics of Life
List all of the characteristics of life and briefly describe each characteristic.
Discuss how one can tell the difference between a living and non living thing.
Work on Ch. 1 Vocabulary