1. Introduction to Living Things
Diversity of Life Chapter 1

2. How are the Manatee and Hyrax Alike? (pg 1)
Untamed Science Video:
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3. Diversity of Life Chapter 1.1
What is life?
Diversity of Life Chapter 1.1

4. My Planet Diary (page 4)
What does the kismet do that makes it seem human?
It can respond to situations.
It can understand information.
It can make faces.

5. My Planet Diary (page 4)
What are some things you think Kismet might not be able to do that humans can?
It can’t eat.
It doesn’t grow.
It doesn’t get sick.

6. What is a living thing? Living things are also called organisms.
There are 6 characteristics that most living things have

7. Name an example of a unicellular living thing.

8. Name an example of a multicellular living thing.

9. Characteristics of living things
Cellular Organization
Contain similar chemicals
Use Energy
Respond to their surroundings
Grow and Develop
Reproduce

10. Cellular Organization
• Made up of one cell (unicellular) or many cells (multicellular)
• Cells - basic unit of structure and function in living things

11. The Chemicals of Life
Most common is water
Carbohydrates - main energy source
Proteins and lipids- building materials
Nucleic Acids - genetic material

12. Use Energy
Metabolism - the combination of chemical reactions through which an organism builds up or breaks down materials
Use energy to grow and repair injured parts
Get energy directly or indirectly from the Sun

13. Response to surroundings
Stimulus - a change in an organisms surroundings that causes an organism to react
Response - an action or a change in behavior

14. Growth and Development
Growth - getting larger in size
•Unicellular organism - grow in size
•Multicellular organism - grow in number of cells
Development - process of change that occurs during an organisms life

15. Reproduction
-ability to produce offspring
Asexual Reproduction - involves only one parent and produces offspring that are identical to parent
Sexual Reproduction - involves two parents

16. A change in an organism's surroundings is a stimulus or response?
Review Questions
A change in an organism's surroundings is a stimulus or response?
2. A bird sitting in a tree flies away as you walk by. Which characteristic explains the bird’s behavior?
STIMULUS
Response to surroundings

17. Review Question
Trees do not move like birds do, but they are living things. Why?
They have all of the characteristics of life; cells, chemicals of life, use energy, respond, grown and develop, and reproduce.

18. What do living things NEED to survive
Food
Water
Living Space
Stable internal conditions

19. FOOD
Autotrophs - make their own food
Heterotroph - cannot make their own food

20. All Living things need water
•Humans are made up of 70% water
•Human blood is made up of 90% water
•Water breaks food down, helps organism grow, moves substances within bodies, and helps organisms reproduce.

21. 3. Living Space
All living things need a place to live
Surroundings must provide what it needs to survive

22. 4. Stable Internal Conditions
Homeostasis - the maintenance of stable internal conditions
Example: Body Temperature

23. Which basic need is a fox meeting by feeding on berries?
Review Questions
Which basic need is a fox meeting by feeding on berries?
Food

24. The arctic fox has thick, dense fur in the winter and much shorter fur in the summer. How does this help the fox maintain homeostasis?
It helps the fox keep its internal body temperature even though the temperature of its surroundings changes.

25. Where do living things come from?

26. Spontaneous Generation
Before the 17th century, some people thought that:
insects and fish came from mud
earthworms fell from the sky when it rained
mice came from grain

27. Spontaneous generation
Four hundred years ago, people believed in spontaneous generation
Spontaneous generation - the mistaken idea that living things can arise from nonliving sources

28. Figure 3, Page 8
Open the textbook to page 8 and let us discuss figure 3

29. Redi’s Experiment
Helped disprove spontaneous generation
Created a controlled experiment to show that maggots, which develop into new flies do not arise from decaying meat

30. Diagram of Redi’s Experiment

31. Pasteur’s Experiment
Louis Pasteur’s experiment finally disproved spontaneous generation

32. Pasteur’s Experiment

33. Why did the theory of spontaneous generation change?
Experiments did not support it! From the mid- 17th century through the mid- 18th century, experiments were conducted to test the theory of spontaneous generation.