1. Welcome to Biology! October 16 & 17
Unity and Diversity Lesson
Please get:
Science Journal
Get graded work off back table
Get two green pieces of paper

2. Last Time…
We discovered some of the major evolutionary events on earth, including when life evolved (more to come on that!)
Warm UP:
This time: What does it even mean to be alive? What do we all have in common?

3. Back to your timeline… How close were you? Universe formed- 15 bya
Earth formed- 4.6 bya
First oceans- 3.8 bya
First simple cells- 3.6 bya
First oxygen- 2.2 bya
First complex cells- 1.7 bya
First animals- 700 mya
CAMBRIAN EXPLOSION!- 545 mya
First plants- 470 mya
PERMIAN EXTINCTION!- 250 mya
Dinosaur extinction- 65 mya
First humans- 200,000 years ago

4. Learning Targets
I can observe and hypothesize the traits that make groups of organisms different from each other.
I can hypothesize the 8 characteristics that group ALL living things together.

5. Unity and Diversity You need a partner and 12 different leaves.
Follow the directions on the Unity and Diversity handout and record your findings in your journal.
At the end, we will brainstorm the characteristics of life as a class.

6. What is Life? Biology is the study of living things
Living things are divided into six kingdoms based on genetic and physical similarities:
Plants, animals, fungi, protists, bacteria, archaebacteria
Living things (organisms) are extremely diverse, but share eight characteristics in common

7. Archaebacteria
Fungi
Plants
Bacteria
Protists
Animals

8. Characteristics of Life
Characteristic One: Organisms are made of units called cells
Organisms can be unicellular (made of one cell) or multicellular (made of many cells)

9. Characteristics of Life
Characteristic Two: Reproduction
All living things reproduce themselves
Reproduction is asexual (one parent) or sexual (two parents)

10. Characteristics of Life
Characteristic Three: Based on genetic code
Organisms have DNA or RNA that is a blueprint for creating them
DNA or RNA is passed on to offspring

11. Characteristics of Life
Characteristic Four: Growth and Development
All organisms grow, either by enlarging their one cell or dividing their cells millions of times

12. Characteristics of Life
Characteristic Five: Need for materials and energy
Organisms create and break down molecules to fuel their chemical reactions
The four molecules we use are proteins, fats, carbohydrates, and nucleic acids
This is called metabolism

13. Characteristics of Life
Characteristic Six: Response to environment
Organisms detect and react to stimuli in their environment
Stimuli are internal (like your blood sugar) or external (like plants reacting to sunlight)

14. Characteristics of Life
Characteristic Seven: Internal balance
Organisms keep their internal environment stable through homeostasis
Ex: Body temperature
when you get too hot, you sweat to cool your skin
when you get too cold, you shiver to warm your body

15. Characteristics of Life
Characteristic Eight: Evolution
Populations of organisms change over time in response to their environment
Changes are only significant over long periods of time