1. Unit 1 (Chapter 1) The Basis of Life Part 1
Intro to Biology
Unit 1 (Chapter 1)
The Basis of Life
Part 1

2. Vocabulary Intro Section 1.1 Biosphere Organisms
Spontaneous generation
Biogenesis
Cell
Tissues
Organs

3. Section 1.1 Big Ideas Compare different theories of the origin of life
Summarize the properties of life

4. Compare different theories of the origin of life
Vitalism
Popular 2300 hundred years ago
Living things exist because they have been filled with special forces (ethers)
It was the well accepted belief for 2000 years
Spontaneous Generation
The process of life beginning when ethers enter nonliving things
Ex. The belief that rotting meat actually produced maggots

5. Compare different theories of the origin of life
Biogenesis
Francesco Redi – Maggot/meat experiment
click here for video
“bio” means “life”, “genesis” means “beginning”
Scientific method at work
What was the control?
What was the independent variable?
What was the dependent variable?
Conclusion: maggots are indeed the product of flies

6. Compare different theories of the origin of life
Changes in the theories in all science often happen as a result of an increase of technology
Ex: Telescopes and Microscopes
Both allowed us to see things we had not been able to prior to their invention
Human discoveries of the time:
The heart is a mechanical pump; not just an organ of emotion
These new methods for discovery allowed scientists to determine “the properties of life”

7. Summarize the properties of life
Similarities between living and nonliving things
Both are composed of the elements (the materials present on Earth)
They all obey the same laws of nature
Characteristics that make living things different:
Organization
Energy
Growth/development
Reproduction
Response and adaptation

8. Summarize the properties of life
Organization
Basic unit = cell
Single cell and multi- cell organisms exist
Specialized structures
Energy
Light energy is key to life
Chemical NRG to grow, etc
Chemical NRG from food

9. Summarize the properties of life
Growth and Development
Growth = increase in size
Development = change in shape and/or form
Changes from species to species
Reproduction
The process thru which new living things are formed
Production of new cells

10. Summarize the properties of life
Response and Adaptation
growth
migration
Color changes
Plants growing toward the light
You sneezing in response to dust
Bacterium producing biological anti-freeze to survive in the arctic

11. Basic Structure
Cells = fundamental units of life that exhibit all of the properties of living things
Cells contain specialized compartments that do jobs
Tissues are groupings of cells that work together to perform specific functions
Organs = groupings of tissues that function together for a specific purpose
Organ system – a group of organs